Getting WS internal error while executing the method’s of proxy class .

Dear Experts.

I'm getting WS internal error while executing the method’s of proxy class . I have consumed webservice and created active logical port(with valid login credentials) in ECC System.

But when executing proxy class method's im encountering above stated error.

But same is working fine SOAP UI after providing user id and password for the same.

Any inkling on how to resolve this issue by adding any code in WSDL file.

Thanks

KH