[DVB] MP Standby -> Resume -> No encrypted channels?

[ziphnor]

Windows Version: Windows XP SP2
CPU Type: AMD Athlon64 3000+(Venice E6)
Memory: 2x256 + 1x512MB DDR400
Motherboard: Asus A8N-E
Motherboard Chipset: Nforce4 Ultra
Motherboard Bios: V. 1013
Video Card: ATI X550
Video Card Driver: ATI 6.3
Sound Card: Onboardac
Sound Card AC3:
Sound Card Driver: ?
1. TV Card: Twinhan Cab CI
1. TV Card Type: DVB-C
1. TV Card Driver: BDA 1.2.3.8 WHQL
2. TV Card: Twinhan Cab CI
2. TV Card Type: DVB-C
2. TV Card Driver: BDA 1.2.3.8 WHQL
Video Codec: Intervideo
Audio Codec: Intervideo
Satelite/CableTV Provider: TDC (denmark)
HTPC Case: Custom
Power Supply: 350W noname
Remote: MCE 2005
TV: Phillips 28" PAL CRT
TV - HTPC Connection: VGA->SCART

Problem:
I have my HTPC set up to automatically go into standby. Frequently when i resume from standby i can only watch unencrypted channels.

Sometimes this can be cured by restarting MediaPortal, other times it is necessary for me to start MyTheatre instead, tune an encrypted channel, close MyTheatre and then restart MediaPortal. This leads me to suspect that this problem is at least partially related to MediaPortal, or at least that MyTheatre in someway manages to 'reset' the CAM in a way that MediaPortal does not.

I intended to include some log files but unfortunately the MP test tool didnt create the logs for some reason. I will attempt to get some tomorrow/next time it fails, but until then i would still like to get an idea of what the problem can be.