AC3 codec problem while playing Movies

[reuvenah]

TV-Server Version:
MediaPortal Version:0.2.3.0
MediaPortal Skin: Project Mayhem III
Windows Version: XP Pro SP2
CPU Type:E4500
HDD: 500G Maxtor
Memory: 2G
Motherboard: Gigabyte 945
Video Card: 8400 Nvidia
Video Card Driver: Nvidia PureVideo, ffdshow
Sound Card: Prodigy HIFI 7.1
Sound Card AC3: ,
Sound Card Driver: Nvidia PureVideo, AC3 Filter
1. TV Card:
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:
MPEG2 Audio Codec:
h.264 Video Codec:
Satelite/CableTV Provider:
HTPC Case:
Cooling:
Power Supply:
Remote: Marantz RC3200
TV:
TV - HTPC Connection:




Hi All,

I have problem while playing movie with AC3 (SPDIF), evry time when i switch to ac3 sound, I have choppy frame and sound,

It happening only with AC3,playing movies with regular stereo it ok, it also showing the same symptoms when i useing Media player classic and Media palyer 11, my cpu usage it 40-60% even less and the memory is 500M.

Someone have an idea what could be the problem????

Thanks,
Robbie