Sound but blank screen with upgrade (1 Viewer)

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TV-Server Version: RC1
MediaPortal Version: Curent Version
MediaPortal Skin: Blue Two Wide
Windows Version: Vista
CPU Type: AMD 64 5000+HDD: Samsung
Memory: 2 Gb
Motherboard: Asus
Video Card: 8400GS
Video Card Driver:
Sound Card:
Sound Card AC3:
Sound Card Driver:
1. TV Card: TechniSat
1. TV Card Type: DVB-S
1. TV Card Driver:
2. TV Card: Hauppage 500
2. TV Card Type: DVB-T
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:
MPEG2 Audio Codec:
h.264 Video Codec:
Satelite/CableTV Provider:
HTPC Case: Excel MATX
Cooling:
Power Supply:
Remote: MCE
TV: Samsung 43"
TV - HTPC Connection: HDMI

I have just upgraded to RC1.0.0.0 from RC3
Everything worked fine on the previous install, but after an un install and then reinstalling the new RC1 everything works except the TV only gives sound no picture.
What is the difference between the two that may have caused this?

 

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Was using the Cyberlink power cinema with h.264 and changed over to Cyberlink PowerDVD8 h.264 and this solved the problem