Hi,

> Our customer has changed the server from Windows XP to new HP server
> Windows 2008 R2 64bit, where he needs to run FB2.1 32bit.

There's a problem with Windows 2008 server and 32 bits FB (and other apps)  regarding to cache memory. See if your box is taking a lot of RAM (near 100%), if yes, than you should use a tool to set a max cache, read more (and get a tool) here:

http://community-old.wyse.com/forums/topic.php?id=143


Regards,
Anderson