No HDTV with ION / Technotrend S-3600 (1 Viewer)

[Diablokiller]

MediaPortal Version: 1.1 RC1
MediaPortal Skin:
Windows Version: Win7 x32
CPU Type: Atom 2x1,6GHz
HDD: 320GB
Memory: 2GB DDR2 800
Motherboard: ASrock ION330
Video Card: GeForce 9400
Video Card Driver: 197.13
Sound Card: Onboard
Sound Card AC3:
Sound Card Driver:
1. TV Card: Technotrend S2-3600
1. TV Card Type: DVB-S2
1. TV Card Driver: newest
MPEG2 Video Codec: ffdshow
MPEG2 Audio Codec: ffdshow
h.264 Video Codec: ffdshow DXVA
Satelite/CableTV Provider: Astra
TV - HTPC Connection: HDMI

Hi!
Got some Problems with my System.
Using the TT 3600 TV-Card via USB, the Card works well with MediaPortal so far. I find over 1000 programs, can manage them etc. The only problem I got is that I can't watch HD-Programs with my TV in MP, SD works perfectly!
The Image freezes and only sound goes on. Tried SAF 4 with MPC-HC h264 Codec an SAF5 with ffdshow DXVA, even the PowerDVD AVC Codec that comes with the driver doesn't work well, here the image stucks, fragments are coming and MP shuts down.
Tried the TT Software, there are no problems with Arte HD etc.

Don't know what to do

Ah forgot, 1080p Movies from HDD work fine...