Request for security token failed with exception: System.ServiceModel.FaultException: The server was unable to process the request due to an internal error

We were working on setting up a third party forms authentication provider on our test server and we started getting the message:

"Request for security token failed with exception: System.ServiceModel.FaultException: The server was unable to process the request due to an internal error

 at Microsoft.IdentityModel.Protocols.WSTrust.WSTrustChannel.ReadResponse(Message response) "

This message does not give much information as to what exactly the problem is how to fix it.  Do you guys know what things I could try?  Is there some way to get more information on this error?

thanks,