I seem to have a problem registering a user for an event.  My Header information can successfully call GetAPIVersion but when I try to the RegisterMeetingAttendee call I get an "Incorrect user or password" failure.  Please help, not sure what I'm doi...

When trying to use the XML api using the C# sample.  I always returns the "Failed to get SiteUrl" Error.   Please help.string strXML = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n";strXML += "<serv:message xmlns:xsi=\"http://www.w3.org/2001/XMLSch...