that is always nice to fix something just by finding the simple problem. I put in a new garbage disposal last year and hooked up everything and plumbed the dishwasher hose into it like it was before. Garbage disposal worked like a dream. ran the dishwaser a while later and it wouldn't drain. come to find out there is a plug about an inch into the neck you have to knock out of the new garbage disposal so that the dishwasher can drain. i felt like an idiot.