My sky remote will not turn channels over ?

I have 3 sky remotes and they,ve all stopped working via the sky video link remote which enables u to turn yr sky over from another room I have the little red led light on each small remote which sits near the tv and all was well yesterday!!!! Have tried re programming with the code 0206 but I'm not even getting the red light too. blink twice on any remote. H E L P,,,,,!!! Please