If the draw is all nice and clean and the siphon tube is free from congestion then it will probably one of a few things either the fabric conditioner valve is faulty, or the holes inside the soap draw compartment are blocked. It is unlikely but possible that you have a wiring fault. If you are sure the small holes in the top of the dispenser compartment are clear then I would probably go with the faulty valve. Depending on which model you have it is possible to test the valves by switching over the wires but as I do not know which one you have I cannot advise you on this issue.
casper...http://www.selfix-uk.co.uk
November 2008