Mediaportal Homescreen Problem (1 Viewer)

[Lococo]

MediaPortal Version: MP 1.1 & MP 1.2
MediaPortal Skin: StreamedMP
Windows Version: Win 7
CPU Type: Atom 330
HDD: OCZ 2,5" 32GB
Memory: 1GB Ram
Motherboard: Zotac ION
Video Card: Nvidia ION
Video Card Driver: Updated
Sound Card: Nvidia HDMI Audio
Sound Card AC3: Updated
Sound Card Driver: Updated
1. TV Card: Floppy DTV Card - C
1. TV Card Type:
1. TV Card Driver:
2. TV Card:
2. TV Card Type:
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: Standard
MPEG2 Audio Codec: Standard
h.264 Video Codec: Standard
Satelite/CableTV Provider: Cablecom
HTPC Case:
Cooling:
Power Supply:
Remote:
TV:
TV - HTPC Connection:


I have a Problem with Mediaportal.
Everytime i start Mediaportal, no mather what Skin or in Fullscreen or Windowed Mode, the Homescreen is blanked white.
One time i started Mediaportal Skin Blue and maximazed the Screen from Windowed to Max,
suddenly the Homescreen appears (Not everytime). And sometimes i could start Mediaportal without problems...
But until now only about 2 or 3 Times.

Have anyone a Idea what could be the Problem?
The only what i have seen is in the Microsoft Index - Aero Desin is about 1.0 and don't know why.
I have updated everything... Driver, Bios etc. from the Homepage (Zotac).

If someone has a Idea pls replay

mfg Andreas