Sounds Like One of the fill valves is weeping when off (like a dripping tap) or water is back filling from the sink, if it is connected that way ~Try:- Filling the sink with water then pull the plug see if the drum fills up?).
Is it Clean or Dirty water ?
Also try truning the Hot & cold water taps of individualy on separate cycles at the end of the wash to work out which inlet valve is weeping.
Cold valve pt no:- c00080664
Hot valve pt no:- c00066517
Dee Jay
March 2006