Hello Victor,
Please find the below points.
1) If you are unable to get the PopUp post adding WSDL,there is some issue with the WSDL or Eclipse version mismatch.
2) If you are adding Operation Name,End point and rest of the parameters you need to add below namespace mapping at run time( if you were able to get the popup,below entry will automatically gets created).If you are still facing the same issue please attach the Tail Log.
How to capture Tail Log in Eclipse:
Click on Window--->Show View--->Other--->Integration Operations Monitoring--->Tail Log
Give some value for Log Size post selecting your Tenant Management Node and then press ENTER[ Entry in node Manager starting with TM* ]
Regards,
Sriprasad Shivaram Bhat