Hi chschs
Do you have the problem after wake-ups? (sleep mode)
Or do you mean that if you watch a channel, it will stop working after a few hours?
I can't find any MP error in the logs (but I'm no expert). the only thing is that your TV card replies with "can not lock". Maybe a card driver issue. Another hint for a driver issue: The MePo protocol says something like Twinhan: Tunex xxx, but you have only cynergy cards according to your system profile.
Regs
Henning