I had the same thing
You need to switch the machine off and unplug it from the mains.
Tip the machine backwards to empty out any water it may have collected, once no more water comes out, stand it back up and then check your plumbing for blockages.
Once you have cleared any blockages plug in the dishwasher and switch the machine back on and it should work.
Mine was as good as new
I hope this helps
Iain, August 2011