How to handle fault message when getting error HTTP 500.

Hi Experts

I am working with a XI to SOAP scenario I use "do not use SOAP Envelope" because I need authentic for soap header, for do it, I use java mapping.

when I put the user or password wrong the service get fault message with error HTTP 500.

I need to know how to handle this error.

I used modules in soap receiver channel, but I do not get a solution for mi problem.

I need that error can be handler from abap proxy.

Thank you

Regards

Johan Calderon