tvservice keeps crashing while idling (1 Viewer)

[bindalf]

TV-Server Version: tvengine3-12-06-2007--01-37h--Rev16603
MediaPortal Version: latest
MediaPortal Skin: Blue2
Windows Version: Windows XP Pro
CPU Type: Intel Core Duo E4400
HDD: Trekstor 250GB, Samsung 60GB
Memory: 1GB DDR2
Motherboard: ASUS P5B-VM DO
Motherboard Chipset:
Motherboard Bios:
Video Card: MSI 2600XT
Video Card Driver:
Sound Card: Creative Audigy 2
Sound Card AC3: coaxial out
Sound Card Driver:
1. TV Card: Technotrend S2-3200
1. TV Card Type: DVB-S
1. TV Card Driver: BDA 5.0.0.6
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 PowerDVD7
MPEG2 Audio Codec: Cyberlink PowerDVD7
Satelite/CableTV Provider: Astra 19.2°E
HTPC Case: CoolerMaster ATCs
Cooling:
Power Supply: NesteQ NA6201 620W
Remote: MCE V2
TV: Sanyo PLV-Z5
TV - HTPC Connection: DVI-HDMI


i dont know what i changed, since some days the tvservice keeps crashing after some idle time.. it doesnt really crash.. i just get no audio/video or my recordings are 0 bytes. after restarting tvservice everything works fine... for a while !
dont know if this is normal : the task tvservice.exe takes up to 120mb ram after watching tv. even while idling

dont have a logfile at the moment.