miraclebox twin hd two dvc tuners can't record one channel and watch another

[john doe]

I think it's fine mate I've got a picture on the TV also tried switching tuners both a and b work on their own but wen I record and change chsnnel is when I get that msg about transponders

have you checked that the two sat feeds are not loose from box of box?

the only other thing I can suggest is a re-flash. are you using ABM?