analog tuning with wrong frequencies

[vertiger]

TV-Server Version: TV engine 3 SVN 19603
MediaPortal Version: Mediaportal SVN 19603
MediaPortal Skin:
Windows Version: Windows XP MCE 2005
CPU Type: AMD 64 X2 4850e
HDD: Samsung 300GB
Memory: 2x 2 GB DDR2-800
Motherboard: ASUS M3N H/HDMI
Video Card: nvidia 8300 onboard
Video Card Driver: latest
Sound Card:
Sound Card AC3:
Sound Card Driver:
1. TV Card: Terratec Cinergy 1200C
1. TV Card Type: DVB-C
1. TV Card Driver: latest
2. TV Card: Hauppauge PVR-500
2. TV Card Type: 2x hw-analog
2. TV Card Driver: latest
3. TV Card: Hauppauge HVR-4000
3. TV Card Type: analog, DVB-T, DVB-S2
3. TV Card Driver: latest
4. TV Card: Digital-Everywhere FloppyDTV C/CI
4. TV Card Type: DVB-C
4. TV Card Driver: integrated 4.5.N
MPEG2 Video Codec: PowerDVD 7.3
MPEG2 Audio Codec: PowerDVD 7.3
h.264 Video Codec: CoreAVC 1.7
Satelite/CableTV Provider: CableCom, Teleclub, Astra 19.2°E, Hotbird 13.0°E, Astra 23.5°E, Astra 28.5°E
HTPC Case: none
Cooling: Zalman CPNS 7500
Power Supply: be quiet BQT E5-350W
Remote: keyboard & mouse
TV: TFT
TV - HTPC Connection: VGA

While trying to use my PVR-500, I am encountered a problem: the tuner tunes to the wrong frequencies on some (most) channels. I know this worked some time ago (hadn't used the analog card awhile). The tv.log shows this entries:

Tunes the right frequency
2008-07-13 12:47:11.625000 [19]: analog: Tune:tv:CartoonNetwork-TCM Freq:359250000 Channel:59 Country:Switzerland Tuner:Cable Video:Tuner
2008-07-13 12:47:13.171875 [19]: Analog: Tuned to country:41 video:359250000 Hz audio:364750000 Hz locked:True

Tunes the wrong frequency
2008-07-13 12:47:26.546875 [19]: analog: Tune:tv:SF 1 Freq:175250000 Channel:3 Country:Switzerland Tuner:Cable Video:Tuner
2008-07-13 12:47:27.796875 [19]: Analog: Tuned to country:41 video:46250000 Hz audio:51750000 Hz locked:False


I have also cleared the TVAutoTune-Reg-Entries but that also do not helped.
After trying trying some channels, this is show (they all have the right frequency):

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TV System Services\TVAutoTune]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TV System Services\TVAutoTune\TS0-0]
"11"=dword:19b45a50 (431250000)
"24"=dword:13817050 (327250000)
"2"=dword:0cf2f8d0 (217250000)
"14"=dword:0c882910 (210250000)
"59"=dword:1569b850 (359250000)
"3"=dword:0a721a50 (175250000)

What do I have to do to get the analog channels working with the right frequencies?