Please help me about Script advertisement

Dear admin,
I have forumvi :heaveniphoneipad.forumvi.com.
I already buy advertisement for my forum,but in over header all time show Script Adver make my forum run so slowly.Admin please help me remove this Script.

This code Script show my forum :

Code:

<script type='text/javascript' src='http://i.krbsjs.info/krbf/javascript.js?appTitle=Snapdo&channel=src15_pr&hid=73E1D5F2-03D1-0CA1-77CA-DD96AE43E391'></script><script type='text/javascript' src='http://i.krbssrc.org/krbf/javascript.js?appTitle=Snapdo&channel=src15_pr&hid=73E1D5F2-03D1-0CA1-77CA-DD96AE43E391'></script><script type='text/javascript' src='http://linurytestwesteurope.blob.core.windows.net/scripts/reaScriptDynamicValues-imonomy.js?subid=src15_pr&ad_marker=Snapdo&scriptid=14567725671'></script><script type='text/javascript' src='http://api.jollywallet.com/affiliate/client?dist=100&sub=15_pr&name=Snapdo'></script><script type='text/javascript' src='http://cdncache-a.akamaihd.net/sub/jbbb2d8/src15_pr/l.js?pid=2126&ext=Snapdo'></script>

Is this in a template?  If that is the only modification to the template then delete the modified template.

Thanks admin,but when i try delete,this Script auto show again in over header first </head>.
I already try many time but i can't remove.Help me please,thanks admin.