Maybe something got corrupted in the cgminer (or related cgwatcher) settings? Perhaps it's worth trying a 'clean instance' of cgminer, first by itself without cgwatcher. You may want to raise this at the DrillbitSystem forum where it may get more exposure/response from fellow drillbit users/developers.
Cheers
already tried it yesterday made no difference, now the strange part been running the whole day on 54:2:850 and tried 52:2:950 again now....... now the bloody thing works?! running 5min 19 -23 GH/s 32C hw 1.15% now at 0.75%
What temp should the board be and which temp is high?
ed. fan(s) on heat sink a must but fan on otherside recommended