I have a webiste that was migrated from a 32 bits windows 2003 server to a 64 bits windows 2008 R2. It is a SharePoint (MOSS 2007) and .NET v2 application.
Everything went smooth except for a DLL component used to integrate the e-commerce with the bank.
The bank support told me that their component does not run on 64 bits windows. But some users from the internet told me they could make it work enabling 32 bits application on the app pool.
So I've tried to do that, but when I do I get an error 500 on any page. The site got offline, so I had to switch it back.
Is there a way to fix the “enable 32 bits application” on the app pool?