Problem with TV-channel that got dual audiotrack (default/AC-3)

[bigal]

Windows Version: Windows XP Pro Swe SP2
CPU Type: AMD 64 3200+ Venice
Memory: 1024MB DualChannel
Motherboard: MSI RS482M4-ILD
Motherboard Chipset: ATI RS480, ATI SB400
Video Card: Radeon Xpress 200
Video Card Driver: 6.14.10.6583
Sound Card: Realtek HD Sound
Sound Card AC3: Realtek HD Sound
Sound Card Driver: 5.10.00.5128
1. TV Card: TwinHan Cab-CI
1. TV Card Type: DVB-C
1. TV Card Driver: 1.2.3.5
Video Codec: InterVideo (Latest)
Audio Codec: InterVideo (Latest)
Satelite/CableTV Provider: ComHem
HTPC Case: Silverstone LC02
Power Supply: built-in
TV - HTPC Connection: DVI

CVS: 03-02-2006 01:11

Problem:
When I start the channel there's no sound, the default audio is choosen (MPEG2).
To get the audio working I have to switch to AC-3 (that doesn't work) and back.
The audio will work aslong as I do not switch to a channel on another transponder and back again.
Then I have to do the prosedure again.
Note: The audio works if i switch to a channel on the same trnsponder and then back...
Note: If i switch MyTV OFF and then ON again the audio disapears again

Steps i made:
1) start MP
2) start MyTV
3) switch to the "problem" channel(s), no audio
4) switch to AC-3, no audio
5) switch to default audiotrack, audio works
6) switch to a channel on another transponder
7) switch back to the "problem" channel, no audio
8) test to switch to the allready choosen audiotrack(Default), no affect
9) switch to AC-3, no audio
10) switch to default audiotrack, audio works
Note: another problem occurs here (step 10)...the screen go's black but the audio works. This problem has happend before but not everytime. Sometimes the picture starts to work when i troggle the meny. but this time it doesn't.

The channels that has this problem is SVT1 and SVT2, Swedish channels(on the provider ComHem)

/BigAl