Unknown error after after watching TV for some time (1 Viewer)

[MPUserFromGER]

TV-Server Version: TVE3, SVN 14192
MediaPortal Version: 0.2.2 with SVN 14195
MediaPortal Skin: BlueTwo Wide
Windows Version: Windows XP Professional MCE Edition with SP2
CPU Type: AMD Sempron 3400+ (AM2)
HDD: Samsung 250GB
Memory: 1GB DDR
Motherboard: MSI Platinum Board
Motherboard Chipset: nForce 570
Motherboard Bios: Award
Video Card: nVidia GeForce 6600 GS
Video Card Driver: nvidia V93.71
Sound Card: On-Board
Sound Card AC3: AC3 / optical SPDIF out
Sound Card Driver:
1. TV Card: Technotrend S2-3200
1. TV Card Type: DVB-S and DVB-S2
1. TV Card Driver: 4.4.1.18
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: Cyberlink PowerDVD 7
MPEG2 Audio Codec: Cyberlink PowerDVD 7
Satelite/CableTV Provider: Astra 19.2 E
HTPC Case: Ahanix MCE 601
Cooling: power supply fan, CPU boxed cooler, 2 housing fans (all controlled by SpeedFan)
Power Supply: Ahanix
Remote: Logitech Harmony 525
TV: Samsung LCD 32"
TV - HTPC Connection: Sub-D

With the latest SVN (from yesterday), I got an unknown error right after I have ended a scheduled recording manually in MP. I could not watch TV any more afterwards.

The TV server shows the following error:

19.04.2007 22:36:02 Exception ystem.Collections.Generic.KeyNotFoundException: Der angegebene Schlüssel war nicht im Wörterbuch angegeben.
bei System.ThrowHelper.ThrowKeyNotFoundException()
bei System.Collections.Generic.Dictionary`2.get_Item(TKey key)
bei TvLibrary.Implementations.DVB.TvCardDVBS.Tune(Int32 subChannelId, IChannel channel)
bei TvService.TvCard.Tune(User& user, IChannel channel, Int32 idChannel)
19.04.2007 22:36:02 Exception er angegebene Schlüssel war nicht im Wörterbuch angegeben.
19.04.2007 22:36:02 site :Void ThrowKeyNotFoundException()
19.04.2007 22:36:02 source :mscorlib
19.04.2007 22:36:02 stacktrace: bei System.ThrowHelper.ThrowKeyNotFoundException()
bei System.Collections.Generic.Dictionary`2.get_Item(TKey key)
bei TvLibrary.Implementations.DVB.TvCardDVBS.Tune(Int32 subChannelId, IChannel channel)
bei TvService.TvCard.Tune(User& user, IChannel channel, Int32 idChannel)