I encountered a very weird scenario with the following code:

           CspParameters csp = new CspParameters(1, "Tev CSP v3.0");
           csp.KeyNumber = 2;

           RSACryptoServiceProvider rsa = new
RSACryptoServiceProvider(csp);
           byte[] data = new byte[2];
           data[0] = 0;
           data[1] = 1;

           byte[] sig = rsa.SignData(data, "SHA1");

I m trying to sign a data using a certificate that resides in a smart card.
The above code works perfectly well with .NET framework 1.1. However, when i
compile and run it on .NET framework 2.0,  exception was caught when calling
byte[] sig = rsa.SignData(data, "SHA1");

The error is as follow :

An unhandled exception of type
'System.Security.Cryptography.CryptographicException' occurred in
mscorlib.dll
Additional information: The keyset is not defined.

Any idea why this happened ? Thanks.