tv server no audio/video found (1 Viewer)

[supra_x206]

MediaPortal Version: latest
MediaPortal Skin: blue two
Windows Version: windows xp sp2
CPU Type: intel P4 2.59 Ghz
HDD: IBM 250GB SATA
Memory: 2 GB DDR
Motherboard: IBM Think Centre
Motherboard Chipset: IBM Think Centre
Motherboard Bios: IBM Think Centre
Video Card:
Video Card Driver:
Sound Card: NVIDIA...
Sound Card AC3:
Sound Card Driver:
1. TV Card: asus mycinema p7131
1. TV Card Type: dont know...
1. TV Card Driver: asustek 1.3.3.11
2. TV Card: ASUS
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:
Satelite/CableTV Provider: Sky Cable
HTPC Case:
Cooling:
Power Supply:
Remote: ASUS Remote
TV: ASUS Widescreen
TV - HTPC Connection:

hi, this is my tv server version:
tvengine3-02-06-2007--01-16h--Rev12866

i installed this damned thing and fortunately it found my tv card! then i followed the instructions on the wiki and got the thing working... well, not really... i have scanned the channels... and it found all of them... but when i tried to preview, it just says "unknown error" or sometimes, no video/audio found... same goes for timeshifting...

and here's another one: since i got the server working, MP freezes most of the time and i have to restart my htpc again...

is there an explaination for all this? why can't i find enough docs to make me understand how this whole thing works? i mean, processes and stuff like that, db structures... know what i mean?

anyways, tnx in advancefor the help!