Windows Server 2008 64 bit Compatibility Mode Errors

[Jerry C]

I have a asp.net website product that I installed on a 64bit machine IIS7.0
for the first time. I am getting the error:
Could not load file or assembly 'Name of a dll ' or one of its dependencies.
An attempt was made to load a program with an incorrect format.

I think this is a compatiblaity issue with the 64 bit machine. The dll's are
from 32bit machines. It is a third party dll so I cannot recompile it.

How do I troubleshoot this.

Thank you

 

[Jerry C]

Peter,

Thank you for the reply. It confirms there could be a problem with the 64
bit machine and 32 bit dll's.

The problem is the dll's with the error are third party dll's. I cannot
recompile them. They will run in a web site so setting the IIS 7.0 server to
32 bit may be the only solution if that is possible. I wonder if any one else
has this problem.

Thank you