Problem Connecting with SAP R3 for creating new model

Hi,

i have a problem with connecting to the SAP R/3 when i want to create a new model with BAPIs.

The error is:

Internal Error has occured.

Plugin name: Web Dynpro Model Editor Services

Method: next Pressed

Message: Internal error - see detail information in exception trace.

Exception: Failed to execute runnable

How do i get to the exception trace, or what could be the problem?

Regards. Stefan