zanussi fle1215w - pauses mid cycle won't drain rinse or spin?

my zanussi fle1215w washer washes continuously until it gets to the stage in the cycle where it has to drain water. it then stops and the pause light flashes. if i try to advance the cycle by 1 stage the light on the fabric setting goes out. It rumbles for a few seconds then the pause light comes on again. can't advance to drain or spin only. error code led show lights:- 3, 4 & 6 flashing.