I assume your referring to the fabric conditioner compartment. Remove the drawer & the blue insert, make sure the hole in the tube under the blue insert isn't blocked, you should be able to run water through this & it should flow out from under the drawer at the side. Once you're happy thats ok check inside the housing of the drawer that the water jets above are not blocked with mildew. Give it a try, if your problem still occurs you might have a faulty valve.
The washer man
July 2010