Problem with my Bosch Dishwasher?

I have a Bosch LogiXX Auto option dishwasher. It was working fine for quite some time. But now there is a problem using any program. All programs stop at the last 15 min time and not reducing further. When I opened the door I found the vessels are washed but water stagnant at the bottom. What is this problem due to? Is there any remedy?

Saara
January 2010