Ok.. I will start from the beginning.. our garbage disposal stopped working.. the motor would hum but not grind.. eventually it died altogether.. so we replaced it and installed a new garbage disposal. Then we decided we were ready for a new dishwasher.. so we bought one from sears and they came.. removed the old dishwasher and installed the new dishwasher for us. Ever since.. we have been running into a problem with the left sink.. it keeps getting "clogged" even though we don't dump any food down and we never use the garbage disposal.. on top of that the dishwasher keeps backing up into this same sink (on the left side) and the disposal stopped working (and it's BRAND NEW!).. so we called a plumber and he said the dishwasher was installed wrong.. he fixed it (by moving a tube/pipe and then he checked the disposal and said he removed a piece of plastic that seemed to have gotten caught in it.. he did warn us that it may have burnt the motor out completely though and that it may not work.. so we tested it and it worked before he left. Now.. a week later the disposal is just humming and the left sink appears to be clogged.. so the dishwasher is backing up into the left sink again!

Any ideas guys? I'm seriously sick of this constant problem! Ugh