Howard, I just bought a the same dishwasher and it has the same problem. Here's the solution. You need to change the drain pump. It's part number (167082 BOSCH). Just google that and you should be able to find it. I found it on ebay for around $40. If it's buzzing when it energizes, this is the problem. To get it to drain, you can remove the screen in the bottom of the dishwasher. There is a removable part that is held in place with only one torx screw. If you remove the screw and lift the piece up, you can rotate the impeller manually. Put the part back on there and then reenergize. It should empty the tub. The problem will only get worse though. Good Luck.
Mark Gober
May 2009