cant get normal tv to work with rc1 (1 Viewer)

[Feygan]

TV-Server Version:
MediaPortal Version: RC1
MediaPortal Skin:
Windows Version: Vista home premium 64
CPU Type: Athlon 64 6000+
HDD:
Memory: 2gig
Motherboard:
Motherboard Chipset:
Motherboard Bios:
Video Card: ATI x1950
Video Card Driver:
Sound Card:
Sound Card AC3:
Sound Card Driver:
1. TV Card: Hauppage nova t500
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:
MPEG2 Audio Codec:
Satelite/CableTV Provider:
HTPC Case:
Cooling:
Power Supply:
Remote:
TV:
TV - HTPC Connection:


Ok so I had a windows update recently and for some reason I can't watch tv anymore on media portal. When I click on "my tv" I get the following effor message "cannot add microsoft filter microsoft dvbt network provider"

anyone any clues as to how I can fix this?