WinTV HVR-900 - no graph (1 Viewer)

[Oberon]

I've got a Hauppauge WinTV HVR-900, and it should be supported by Media Portal, but when i try to configure the tv-card i get the error -unable to create graph for this device-

i've installed the V0.2.3.0 RC1, got the codecs, tried to use graphedit, searched the forum, asked on irc,... nothing works...


i've included the log...
pls could someone help me.. i'm totaly over here