Problem with crystal reports in website

After i put all the crystal reports into the /bin folder of my website..
in wwwroot..

it gives me this error



System.Security.SecurityException: Failure decoding embedded permission set object
The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.


i really have no idea..and googling..i also cant find a solution..
can anyone help?

What are the security settings on that folder?

ok i managed to solve this problem by ..installing the .net framwork 1.1
but now i have another problem...

The located assembly's manifest definition with name 'CrystalDecisions.Shared' does not match the assembly reference.

anyone can help?