I just read that Windows server 2008 is NOT supported in de Cognos Controller 8.5 release…
Microsoft SQL server 2008 will be supported 
here is the offical link for controller 8.5 supported environments
http://www-01.ibm.com/support/docview.wss?rs=3450&uid=swg27017475
That’s exaclty one of the problems i’m facing now.
I’m not 100% sure but Windows 2003 supports expires this year, isn’t it?
Another thing which is not very clear is the support on 64 bit.
I found only this on the IBM Cognos Proven Practices
http://www.ibm.com/developerworks/data/library/cognos/page477.html
Hi Ellen,
IBM Cognos 8 Controller 8.5 is a 32-bit product and will integrate with 3rd party 32-bit libraries only… :’(