how to rest bosch classixx 1000?

I had a blockage in my bosch classixx 1000. Cleared the blockage and changed the pump. Now, the machine pump comes on automatically when i turn the dial. This when i have not pressed start. When i do press start, the pump stays on for 15 minutes, and water flows in now again, only to drain straight away taking all my powder. After 15 minutes, it works as normal. Can someone advise me what to do.

Toby
September 2009