Dashboard/Event Viewer Error

Hello I'm new here; we get the RDM-EE v 6.6.0.0 yesterday.
Installing and playing around with it the "Dashboard/Session Tools/Event Viewer" will not work on all yet tested Windows Server 2008 R2 getting allways a message: "...RPC-Server not available..." (on a German Language System).
Event Viewer on Windows Server 2003 will work. Computer Management and Services will come up on all remote Servers.
What is wrong? What should I do to activate the Event Viewer on 2008 R2, too?
Regards
WiWa53
edited by wiwa53 on 2/17/2012