Center banner help?

How can I center my banner?
It's invision
http://spacebound.forumotion.com/

Well i am unsure if this works for invison but..
Display>Homepage>Headers and navigation>
Logo Postinong: Click Center
Menu postion: Click center

That doesn't work. I need a CSS code to center it.

That doesn't work either.
Here's my CSS.

Code:

body {
background-position: 50% 0%;
  color: rgba(255, 255, 255, 0.8);
color: #EEE;
  background-repeat: no-repeat;
background-color: black;
}
::selection {
color: white;
background: #757575;
}
div#logostrip #logo {
float: left;
}
a:link {
text-decoration: none !important;
}
table.ipbtable .forum-name a, table.ipbtable.index-box, table.ipbtable.index-box a {
font-weight: 700;
text-shadow: -1px -1px 1px rgba(0, 0, 0, 0.4);
}
.ipbtable.calendar .calday {
color: white;
}
#ipbwrapper {
width: 90% !important;
min-width: 980px !important;
}
div#logostrip {
opacity: 0.8;
-webkit-transition: all 250ms ease;
-moz-transition: all 250ms ease;
-o-transition: all 250ms ease;
transition: all 250ms ease;
overflow: hidden;
}
#logostrip #logo img:hover {
opacity: 1;
}
#logostrip #logo img {
opacity: 0.7;
}
div#submenu, #gfooter {
background: url('http://i1150.photobucket.com/albums/o619/skin_forumotion/source/primarynav_bg.png') repeat-x top left;
min-height: 34px;
border-radius: 20px;
-moz-border-radius: 20px;
-webkit-border-radius: 20px;
box-shadow: 1px 1px 3px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.15);
-webkit-box-shadow: 1px 1px 3px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.15);
-moz-box-shadow: 1px 1px 3px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.15);
text-shadow: -1px -1px 1px rgba(0, 0, 0, 0.6);
  padding: 0;
  padding-left: 15px;
}
#submenu ul {
list-style: none;
text-align: left;
font-size: 13px;
float: center;
}
#submenu ul li a.mainmenu {
color: #ACACAC;
display: inline-block;
outline: none;
padding: 0px 12px;
line-height: 22px;
height: 24px;
border-radius: 20px;
-moz-border-radius: 20px;
-webkit-border-radius: 20px;
-webkit-transition: all 250ms ease;
-moz-transition: all 250ms ease;
-o-transition: all 250ms ease;
transition: all 250ms ease;
margin: 4px 1em 0.65em 0;
}
#submenu ul li a.mainmenu img {
display: none;
}
#submenu ul li a:hover {
background-color: rgba(255, 255, 255, 0.1);
color: white;
text-shadow: 1px 1px 5px rgba(255, 255, 255, 0.8);
}
.mainmenu:first-child, ul.privmsg li a, #submenu ul li a:active {
background: url("http://i1150.photobucket.com/albums/o619/skin_forumotion/source/trans30.png") repeat;
background: rgba(0, 0, 0, 0.3);
color: white;
box-shadow: 0 1px 0 rgba(255,255,255, 0.1), inset 0 1px 5px rgba(0,0,0,1);
-webkit-box-shadow: 0 1px 0 rgba(255,255,255, 0.1), inset 0 1px 5px rgba(0,0,0,1);
-moz-box-shadow: 0 1px 0 rgba(255,255,255, 0.1), inset 0 1px 5px rgba(0,0,0,1);
position: relative;
}
#navstrip li a:hover {
color: #E0DCDC;
}
#userlinks {
height: 20px;
background: transparent url('http://i1150.photobucket.com/albums/o619/skin_forumotion/source/bg-footerbar.png') repeat-x top left;
border: 1px solid #2B2B2B;
color: #616B71;
border-radius: 8px;
-moz-border-radius: 8px;
-webkit-border-radius: 8px;
box-shadow: 0 1px 10px rgba(0, 0, 0, 1);
-moz-box-shadow: 0 1px 10px rgba(0, 0, 0, 1);
-webkit-box-shadow: 0 1px 10px rgba(0,0,0,1);
position: fixed;
width: 89%;
bottom: 14px;
z-index: 900;
}
#search_menu {
border-radius: 8px;
background: rgba(0, 0, 0, 0.9);
box-shadow: 0 4px 8px rgba(0,0,0,0.8);
-webkit-box-shadow: 0 4px 8px rgba(0,0,0,0.8);
-moz-box-shadow: 0 4px 8px rgba(0,0,0,0.8);
border-radius: 4px;
-moz-border-radius: 4px;
}
#search_menu input.post {
background: rgba(51, 51, 51, 0.5);
border-radius: 6px;
}
#outer-wrapper {
background: url('') repeat;
background: rgba(0, 0, 0, 0.4);
box-shadow: 0 2px 18px rgba(0,0,0,0.6), inset 0 2px 0 rgba(255,255,255,0.15);
-webkit-box-shadow: 0 2px 18px rgba(0,0,0,0.6), inset 0 2px 0 rgba(255,255,255,0.15);
-moz-box-shadow: 0 2px 18px rgba(0,0,0,0.6), inset 0 2px 0 rgba(255,255,255,0.15);
margin: 20px auto 0 auto;
border: 1px solid black;
border: 1px solid rgba(0, 0, 0, 0.3);
padding: 10px;
border-radius: 12px;
-moz-border-radius: 12px;
-webkit-border-radius: 12px;
  float: left;
  width: 98% !important;
min-width: 980px !important;
}


div.maintitle, .darkrow, .bar {
background: url("http://i1150.photobucket.com/albums/o619/skin_forumotion/source/trans30.png") repeat;
background: rgba(0, 0, 0, 0.3);
box-shadow: inset 0 1px 0 rgba(255,255,255,0.2);
-webkit-box-shadow: inset 0 1px 0 rgba(255,255,255,0.2);
-moz-box-shadow: inset 0 1px 0 rgba(255,255,255,0.2);
color: white;
text-shadow: -1px -1px 1px black;
border-radius: 6px;
-moz-border-radius: 6px;
-webkit-border-radius: 6px;
border: 1px solid rgba(0, 0, 0, 0.4);
padding: 10px;
font-size: 16px;
font-weight: normal;
overflow: hidden;
}

thead, tfoot {
display: none !important;
}
.row2.icon {
width: 50%;
}
.centered {
width: 10%;
}
table.ipbtable td {
border-top: 1px solid rgba(255, 255, 255, 0.1);
border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}
.formsubtitle, .formbuttonrow, .borderwrap .subtitle, .post-footer {
background: transparent !important;
}
.box-content.profile, .box-content, .post {
border: none;
}
div.maintitle .contract, div.maintitle .expand {
visibility: hidden;
background: url('http://i1150.photobucket.com/albums/o619/skin_forumotion/source/cat_minimize.png') no-repeat;
text-indent: -3000em;
width: 32px;
height: 22px;
margin: -5px -5px -10px 0;
display: inline-block;
float: right;
}

div.maintitle:hover .contract, div.maintitle:hover .expand {
visibility: visible;
}
div.maintitle .expand {
cursor: hand;
background: url(http://i1150.photobucket.com/albums/o619/skin_forumotion/source/cat_maximize.png) no-repeat 50% 50%;
}

.forum-desc, .module .box-content {
color: rgba(255, 255, 255, 0.5);
font-size: 11px;
}



.button, .popmenubutton a, .exthelp, .rte-menu-button {
color: #C7C7C7;
text-shadow: rgba(0, 0, 0, 0.3) 0px -1px 0px;
background: url('http://i1150.photobucket.com/albums/o619/skin_forumotion/source/highlight.png') repeat-x 0 0;
background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(255, 255, 255, 0.1)), to(transparent));
background-image: -moz-linear-gradient(top, rgba(255, 255, 255, 0.1) 0%, transparent 100%);
background-image: linear-gradient(top, rgba(255, 255, 255, 0.1), transparent);
box-shadow: inset 0 1px 0 rgba(255,255,255,0.15);
-webkit-box-shadow: inset 0 1px 0 rgba(255,255,255,0.15);
-moz-box-shadow: inset 0 1px 0 rgba(255,255,255,0.15);
-webkit-border-radius: 4px;
-moz-border-radius: 4px;
border-radius: 4px;
height: 22px;
line-height: 22px;
padding: 0 10px;
text-decoration: none;
margin-left: 4px;
  border: none ;
}
.button:hover, .popmenubutton a:hover {
background-color: rgba(255, 255, 255, 0.1);
color: white;
text-shadow: white 0px 0px 4px;
}
button.button2, input.button2 {
background: #333;
border: none;
border-radius: 4px;
padding: 4px;
}
button.button2:hover, input.button2:hover {
border: none;
background: #222;
}
.dd-textarea {
margin: 0 0 6px 0;
width: 98%;
}
.inputbox, input, #text_editor_textarea, .ipbform2 dl dd textarea.inputbox, #textarea_content iframe#text_editor_iframe, form[name="post"] div.clearfix {
padding: 6px;
border: 1px solid #383838;
background: #292929 ;
color: #B7B7B7;
text-shadow: rgba(0, 0, 0, 0.3) 0px -1px 0px;
-webkit-box-shadow: inset rgba(0,0,0,0.2) 0px 1px 4px;
-moz-box-shadow: inset rgba(0,0,0,0.2) 0px 1px 4px;
box-shadow: inset rgba(0,0,0,0.2) 0px 1px 4px;
}


div.errorwrap h4, div.infowrap h4 {
background-color: transparent;
margin: 0 0 15px 0;
padding: 5px 20px 5px 20px;
font-size: 15px;
font-weight: bold;
background-color: #111;
-moz-border-radius: 5px;
-webkit-border-radius: 5px;
border-radius: 5px;
display: inline-block;
margin: 10px;
}

div.errorwrap, div.infowrap {
-moz-box-shadow: 0 -1px 2px #C23B22, 0 1px 1px rgba(255,255,255,0.1) inset;
-webkit-box-shadow: 0 -1px 2px #C23B22, 0 1px 1px rgba(255,255,255,0.1) inset;
box-shadow: 0 -1px 2px #C23B22, 0 1px 1px rgba(255,255,255,0.1) inset;
text-shadow: 0 2px 0 rgba(0, 0, 0, 1);
background: #1C1C1C;
border: #111 solid 1px;
border-bottom: #111 solid 3px;
-moz-border-radius: 5px;
-webkit-border-radius: 5px;
border-radius: 3px;
-webkit-border-bottom-left-radius: 0;
-webkit-border-bottom-right-radius: 0;
border-bottom-left-radius: 0;
border-bottom-right-radius: 0;
-moz-border-radius-bottomleft: 0;
-moz-border-radius-bottomright: 0;
color: #DEDEDE;
font-size: 15px;
line-height: 1.5;
}




/*---body----*/
.postbody-head.postdetails, .post .post-header {
vertical-align: middle;
margin: 0;
background: url(http://i1150.photobucket.com/albums/o619/skin_forumotion/source/bg-maintitle.png) repeat-x 0px 50%;
border-radius: ;
padding: 0px 10px;
border-top-right-radius: 5px;
border-bottom-right-radius: 5px;
}
.postprofile-head.post-header {
border-top-right-radius: 0;
border-bottom-right-radius: 0;
border-top-left-radius: 5px;
border-bottom-left-radius: 5px;
}
.popupmenu, .member, div.overview, #at15s, #at16nms, #at16p, #at16p form input, #at16p form textarea, #at16p label, #at_msg, #at_share .at_item {
background: url("") repeat;
background: rgba(0, 0, 0, 0.7);
border-radius: 6px;
-moz-border-radius: 6px;
-webkit-border-radius: 6px;
box-shadow: inset 0 -1px 0 rgba(255,255,255,0.15);
-webkit-box-shadow: inset 0 -1px 0 rgba(255,255,255,0.15);
-moz-box-shadow: inset 0 -1px 0 rgba(255,255,255,0.15);
margin-bottom: 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.popupmenu li {
background: transparent;
border-top: 1px solid rgba(255, 255, 255, 0.0976563);
border-bottom: 1px solid rgba(0, 0, 0, 0.0976563);
}
.smileys, .topic-footer {
background: transparent;
}


.module.borderwrap {
background: url("") repeat;
background: rgba(0, 0, 0, 0.2);
border-radius: 6px;
-moz-border-radius: 6px;
-webkit-border-radius: 6px;
box-shadow: inset 0 -1px 0 rgba(255,255,255,0.15);
-webkit-box-shadow: inset 0 -1px 0 rgba(255,255,255,0.15);
-moz-box-shadow: inset 0 -1px 0 rgba(255,255,255,0.15);
margin-bottom: 10px;
padding: 10px;
}
.module .maintitle {
padding: 5px;
background: none;
border: none;
}
.module .maintitle h3 {
float: none;
text-shadow: -1px -1px 1px black;
background: url("http://i1150.photobucket.com/albums/o619/skin_forumotion/source/trans30.png") repeat;
background: rgba(0, 0, 0, 0.3);
box-shadow: inset 0 1px 0 rgba(255,255,255,0.2);
-webkit-box-shadow: inset 0 1px 0 rgba(255,255,255,0.2);
-moz-box-shadow: inset 0 1px 0 rgba(255,255,255,0.2);
border: 1px solid rgba(0, 0, 0, 0.4);
text-shadow: -1px -1px 1px black;
-moz-border-radius: 4px;
-webkit-border-radius: 4px;
border-radius: 4px;
padding: 8px;
margin: -6px -6px 15px -6px;
color: #B5B5B5;
  font-size: 11px;
}


.post-icon a img:hover, .posting-icons li a img:hover, .posting-icons li img:hover, .misc-icons li a img:hover {
opacity: 1;
background: rgba(251, 251, 251, 0.06);
}
.post-icon a img, .posting-icons li a img, .posting-icons li img, .misc-icons li a img {
border-radius: 3px;
opacity: 0.7;
margin: 0 2px;
}
.post-icon a img {
border-radius: 8px;
}


blockquote, .codebox.contcode, .spoiler {
background: rgba(51, 51, 51, 0.5);
border-radius: 6px;
border: 1px dotted #C7FF0D;
}
blockquote cite, .codebox dt, .spoiler dt {
border-top-left-radius: 6px;
border-top-right-radius: 6px;
background: #333;
color: #C7FF0D;
border-bottom: 1px dotted #C7FF0D;
}
.codebox.contcode {
border: 1px dotted #F33;
}
.codebox dd {
background: transparent;
border: none;
}
.codebox dt {
border-bottom: 1px dotted #F33;
color: #F33;
}
.spoiler {
border: 1px dotted #386AFF;
}
.spoiler dt {
border-bottom: 1px dotted #386AFF;
color: #386AFF;
}

    .LGlike {
      background: #105289;
      padding: 3px;
      border-radius: 4px;
      color: #fff;
      font-size: 10px;
      font-weight: bold;
      text-shadow: -1px 0.5px #888;
      box-shadow: 1px 1px 1px #888;
      cursor: pointer;
      margin-right: 4px;
    }
    .LGvote { margin: 0 5px; }
    .LGnovote {
      filter:Alpha(opacity=50);
      opacity: 0.5;
      cursor: default;
      box-shadow: none;
      text-shadow: none;
    }

Is this solved as the banner looks centered to me?