Bosch Classixx Dishwasher not Filling?

Hi

Our Bosch Classixx Dishwasher is now about 5yrs old and has not given an ounce of trouble until 4 months ago. We loaded it and turned it on to it's usual cycle. Although the pump started running, the water did not enter the machine to start filling. Usually by pressing the reset/start button you can clear the programme and try again. However, nothing seemed to work. Hubby took it apart (well removed the base etc and took a look at the pipes etc), cleaned them all out and we tried to start it again. The pump came on but no water entered the machine so we were back to square one.

Anyone got any useful ideas as really would like to get it running again.