Cindy
I have been on another site and found the answer, my dishwasher is working again!!!!
http://www.fixya.com/support/t138140-bosch_classixx_slimline_dishwasher_not
Basically I fillled the bottom of the dishwasher with water, then tilted the dishwasher 45 degrees to the left then backwards 45 degrees - some water spilled out. Then turned on to pre-rinse and wow it's working again.
Hope yours does too!
Nigel (Coxwold UK), August 2008