D.H.
Kathy,
Sounds more like your line is clogged or your kitchen sink is clogged or very slow draining. I work at a plumbing co and just read this to the guys and they said the same thing, its not draining right or there is something wrong with the dishwasher itself. Run your sink and see if its draining slow since the dishwasher drains into same line. If not have someone come check the appliance to see why it happened. I dont think it had anything to do with the soap, because that is what I use and never had a problem. Hope this helped a little.
D.