Banner Exchange Code

I haven't worked on codes in a while so I forget what changes I needed to make to this code for it to work. Any help would be appreciated. Thank you.

<!-- Darkness Embraced Banner Exchange code begin -->
<CENTER>
<IFRAME SRC="http://www.darknessembraced.com/exchange/work.php?ID=lunarose" width=468 height=60 marginwidth=0 marginheight=0 hspace=0 vspace=0 frameborder=0 scrolling="no"></IFRAME><br>
<a href="http://www.darknessembraced.com/exchange" target="_blank">Darkness Embraced Banner Exchange</a>
</CENTER>
<!-- Darkness Embraced Banner Exchange code end -->