The following tools proved useful in diagnosing problems with this
Tool
Description
Link
KerbTray
http://support.microsoft.com/kb/326985
Windows 2003 Support Tools
Contains the tool SETSPN which you need to register an SPN.
Located on windows 2003 disk or at the following url:
http://support.microsoft.com/kb/892777
WSE Trace Tool
Provides a tool to look over the WSE Trace output files
http://www.gotdotnet.com/workspaces/workspace.aspx?id=ab938e2f-cabf-4145-b0e9-dbeeaf51dbe5