Error in send step in BPM

Hello,

I ehanced an existing BPM where a send step sends data to a J2EE system. I inserted a switch and put the existing send step to one branche and a new send step to the otherweise-branche. The new send step interrupt with an error:

No exception defined for fault message hostname http://xml.apache.org/axis/>

But there is an exception branche defined. An idea what's the problem?

I didn't define a message called hostname, so where he got this name from?

thx

chris