Ok tried it, but the thing is not to use tuner B when watching tv but to use tuner A for both watching and recording.
Just to zap to the channel when the recording starts on the same tuner i am using.
The thing is that i have problems when using tuner B, i get tuner failed most of the times and are forced to reboot my box to get the tuners to start working again.
I dont know why this happens but i am assuming it is a diseq problem.
Sometimes it works but sometimes it doesnt.
Thanks for your help.