Error when use .NET wrapper for Centera

Hi all,

I got the following run time error after using FPSDK.dll(derived from .NET wrapper for Centera) in my project:

"An exception of type 'System.AccessViolationException' occurred in FPSDK.DLL but was not handled in user code
Additional information: Attempted to read or write protected memory. This is often an indication that other memory is corrupt."

I failed at this line:

FPPool pool = new FPPool(connstr);

I am using VS2005, the version of .NET wrapper for Centera is .631 the version of Centera SDK I use is 3.2.661

Anyone knows how to solve it?

Thanks