Classic ASP invokes dll - works in 32 bit OS but fails in 64 bit OS with IIS 7.5

Hi,

I am working on a Classic ASP application. It uses dlls to upload and download files to web server.

FunctionUpload.dll is registered using the regsvr32.exe command. It works fine in Windows 2003 server , 32 bit OS with  IIS 6.

Now the server is upgraded to Windows 2008 64 bit OS with IIS 7.5.  I registered the dll using regsvr32.exe  command in 64 bit OS. ( regsvr32.exe in C:\Windows\SysWOW64 folder using Admin login)

When the ASP code tried to create an object of that dll it fails.

Set download =Server.CreateObject("FunctionUpload.File")

Please let me know what steps need to be done to access the dll from ASP code on a server with windows 2008 64 bit OS with  IIS 7.5?

How to check if the dll is registered properly on a 64 bit OS?

Should I make any changes in the IIS 7.5 settings to invoke that dll?

Thanks Ashok