Live TV: Channels tune ok, "No signal" trying to watch.

I have a strange problem with my W7MCE.

I've googled for a long time but havent found an answer. I hope someone else has answer...

I have 2x AnySee DVB-T tuners and 1x TechnoTrend T-1500 tuner.

I can tune in channels fine, it finds all channels.
My EPG updates without any problems.

But when I try to start Live TV, it just says "no signal".

I've tried different drivers and tuning the channels again. No help.

Anyone encountered this problem and has any tips what I should do?


EDIT: This is getting even stranger... If I start recording the channel and then turn on Live TV it works perfectly! But if there is no recording going on it says "No signal"! Strange!

EDIT2: All the tuners work 100% perfectly with their own softwares, so this is MC related problem.

I have this problem with my DirecTV HD receiver connected to an RF converter which then connects to my Hauppauge PVR-1800 tuner card if I have 1) watched a channel previously, and 2) have closed MC but not rebooted Windows.

Upon rebooting the machine, I can watch channels again - but if I close MC out (especially if I use the remote to close MC) and then try it again, I get either the no signal error, or a red screen, followed some minutes later by the no signal error. If I then go to the guide on my DirecTV receiver, I can see the channel playing perfectly fine in the mini box....