HELP! I HAVE A PANASONIC NV MX 5B Video Recorder... and havent used for awhile. Filmed a friends wedding on Sat... and it worked both recording and in playback. DV i I linked it to my laptop in Vista to record and it shut off half way. So I captured a bit but not all! Now I cant get it to play any tapes including this... Can you help? Cant imagine the heads could suddenly get that dirty... please can you help me? CA