In the following code snippet:
       Microsoft.Web.Services.Security.Signature sig;
       try
       {
         sig = new Signature(x509Token);
       }
       catch(Exception ex)
       {
         txtStatus.Text = ex.Message + "-" + x509Token.Certificate.GetName();
       }

txtStatus has
 The handle is invalid-C=US, PostalCode=91436, S=California, L=Los
Angeles,etc...
The exception is "The handle is invalid"
Followed by our certificate name.

This runs on several development computers we have here but not an a Windows
2003 Server. I know I'm missing setting something on the Windows 2003 Server
but I'm not sure what. Can anyone point me to what I should be looking at.

Thanks.