Help with SOAP Monitor

I am still having trouble with this. I've done a tcpdump of my monitor, and I get back a HTTP 500 error. I had the customer also do a tcpdump of him doing the request from SOAP-UI, and he gets 200 OK. I'm not sure where to go next. There are some differences in the request, but I'm not sure how to make the monitor request match the one he is generating? Anyone willing to look at some tcpdumps to help me decipher this?