Remote stopped functioning in MP (1 Viewer)

[Peter2]

MediaPortal Version: 0.2.2
MediaPortal Skin: BlueTwo
Windows Version: xp sp2
CPU Type: AMD Athlon 64 Venice 3200+
HDD: 200GB Seagate Barracuda 7200.9 SATA-300 NCQ
Memory: Apacer DDR PC3200 1024MB LFT
Motherboard: Asus A8N8L
Motherboard Chipset: Nvidia Nforce 4
Motherboard Bios: Asus 0401
Video Card: 6150 integrated graphics
Video Card Driver: ForceWare 81.85
Sound Card: Onboard RTL ALC655
Sound Card AC3:
Sound Card Driver: 5.10.0.5200
1. TV Card: Hauppauge Win/TV PVR 350
1. TV Card Type:
1. TV Card Driver: 1.18.21.22266
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:
HTPC Case: Asus Pundit
Cooling: Standard
Power Supply: Standard
Remote: Hauppauge silver 45 buttons
TV: Sony KV-29FX20B
TV - HTPC Connection: (TV) Scart -> Scart convertor -> S-Video (TV-out of Pundit)

Hi guys, I have a strange problem with the remote: it doesn't react anymore 'all of a sudden in MP' where as the LED of the TV blinks when pushing any button.
Replacing the batteries also didn't solve anything and finally using this post from MrMad https://forum.team-mediaportal.com/showthread.php?t=9415&page=2 didn't do anything either so I'm really puzzled of what might be wrong.

I also tried different versions of the IR32 file and without it, MP says that it needs a driver.
Any idea what might be wrong here?

Thanks in advance!
Peter