Had Sky+ since November 07. For the last few weeks everytime I try to playback a recording the picture freezes at random times during the programme. If I back up and try to restart from where it stopped it goes back to 0min every time. I can guess and enter it as viewer defined but it then goes on to freeze again.

I have a Pace box 4.044 with operating system version 1.31B03 and EPG software version 5.02.f

Is there anything I can do or do I have to ring up Sky.
Many thanks in advance,