Doesn't Work/Hang on load of stream!

[seldeterre]

I have the demo version of Elecard MPEG Player installed on a Windows XP server in our head end.  It is installed to E:\Program Files\Elecard\.  When I launch a stream using elecard://x.x.x.x:port/udp I get no display and an error unable to open location.  I have two nics installed and configured.  If I disable the one not attached to the multicast network and try again the software seems to hang and hog 50-60% of the cpu.  I have been successful in getting the software to work on my laptop so I know it isn't a network/stream problem.  Any help would be appreciated.