Can you turn on debug mode and post the request and response?
Sure, only the request shows:
Mon Feb 05 2007 14:02:02 GMT-0800: Request packet: <envelope><header><context></context></header><body><call component="ManagerReportManagement" method="deleteReport" id="0"> <params><param><str>caba10bf-7526-405d-bdfd-ce9f9c019149</str></param></params><refs></refs></call></body></envelope>
Please let me know if I can get anything else.
The request looks fine to me - well formed, no obvious problems, and your other code seems pretty straight forward too. If you post a working example of the issue to jira I'd be glad to take a look at it for you.