HVR-2200 Sometimes recordings without sound (1 Viewer)

[frosty-web]

TV-Server Version: 1.0
MediaPortal Version: 1.0
MediaPortal Skin: blue3wide
Windows Version: xp sp3 all updates
CPU Type: Intel E6600
HDD: WD
Memory: DDR2 667 2 gb
Motherboard: Shuttle SD37p2 Barebone
Video Card: GF 7600 GT
Video Card Driver: newest
Sound Card: onboart realtek
Sound Card AC3:
Sound Card Driver:
1. TV Card: HVR-2200
1. TV Card Type: Analog/digital Hybrid
1. TV Card Driver: D4.8
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:
h.264 Video Codec:
Satelite/CableTV Provider:
HTPC Case:
Cooling:
Power Supply:
Remote:
TV:
TV - HTPC Connection:


Hi all of my MP Server runs fine but there is one issue. when i record there is sometimes no sound on the recordings.
When i record two programs at the same time then one recording has no sound. I think one of the tuners not working right. But i have no clue how i can fix it.

i hope u can help me

thx.