MP&HauppaugeHVR-1300 broken audio in dvr-ms rec. (1 Viewer)

[hoborg]

TV-Server Version:
MediaPortal Version: 1.0 + SVN
MediaPortal Skin: Monochrome 2.3
Windows Version: Win XP SP3 EN
CPU Type: MD Athlon 64 X2 4050+ EE
HDD: SSD OCZ Core Series V2 - 30GB system disk+Western Digital Caviar GreenPower 3.5" 1TB WD10EACS
Memory: 2GB
Motherboard: ASUS M3A78-EMH HDMI (BIOS 1101)
Video Card: ATI 4550 (fanless)
Video Card Driver: Catalyst 8.12
Sound Card: on board
Sound Card AC3:
Sound Card Driver:
1. TV Card: HauppaugeHVR-1300
1. TV Card Type: analog
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: PowerDVD 8.0
MPEG2 Audio Codec: MpaDecFilter.ax 1.1.977.0
h.264 Video Codec: MPCVideoDec.ax 1.1.977.0
Satelite/CableTV Provider:
HTPC Case: Antec Fusion V2 (silver)
Cooling: Passive
Power Supply:
Remote: iMON 2.4 DT
TV: Hyundai Q320
TV - HTPC Connection: HDMI->DVI

Hello.
One of ~6 recordings have broken sound and i would like to found source of problem.
-i am not using TV server
-chanells are tuned OK, no problem when watching LiveTV
-using only analog TV signal.
-problem only happend with sheduled recodrings
-happend of all chanels

Where can be problem?
HauppaugeHVR-1300 drivers?
Microsoft dvr-ms format?
Or MP bug?

Here is video example.

Thanks!