Pvr150mce whistling sound in tv and radio (1 Viewer)

[bilis4]

TV-Server Version:
MediaPortal Version: 2.3.0
MediaPortal Skin: blue wide
Windows Version: xp pro sp2
CPU Type: Amd 3800x2
HDD: Seagate 320
Memory: 1024
Motherboard: Asus m2nvm-dh
Motherboard Chipset: nvidia 430
Motherboard Bios:
Video Card: 7300gt
Video Card Driver: 93,71
Sound Card: onboard
Sound Card AC3:
Sound Card Driver:
1. TV Card: hauppauge pvr150mce
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: Purevideo
MPEG2 Audio Codec: Purevideo
Satelite/CableTV Provider:
HTPC Case: Apevia
Cooling:
Power Supply:
Remote: Mce
TV: Panasonic 42pv60eh
TV - HTPC Connection: dvi--->hdmi

Hi all,

Have any of you ever experienced whistling sound during tv viewing and radio ?
If you play a recorded file from tv the sound is perfect.
I have tried all the different settings in audio and renderer but with no result.
The whistling is especially audible in voices when you say "s"

Regards
Yannis