Config crashes when searching TV-channels (1 Viewer)

[Grossmeister]

TV-Server Version:
MediaPortal Version: 0.2.3.0
MediaPortal Skin: blue two
Windows Version: XP Prof. with SP2
CPU Type: intel E2140
HDD: 160GB S-ATA
Memory: 2x512MB DDR 400
Motherboard: AsRock 775i65G
Motherboard Chipset: i865G
Motherboard Bios:
Video Card: GeForce FX5200
Video Card Driver: Z-Tweaked v158.19
Sound Card: onboard
Sound Card AC3:
Sound Card Driver:
1. TV Card: Hauppauge WinTV Nova-S
1. TV Card Type: DVB-S
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:
Satelite/CableTV Provider: Astra
HTPC Case: NoName
Cooling: Stock intel-Box-cooler
Power Supply: 400W Rasurbo
Remote: Medion X10
TV: CRT, 72cm
TV - HTPC Connection: S-Video

OK guys, I have a problem with my Mediaportal:

I installed 0.2.3.0 today, but I had that problem with 0.2.2. allready. Whenever I enter the config program, and start to search for channels, the whole program crashes, after it has found TV channel #144...I don't know what's wrong, anyone can help me?
I HAD it running once, but I can't remember what I did to make it run back then... :-(

I'm very sad...

Thanks in advance for your help!!