Dishwasher does not drain completely

Hi,

My Dishwasher GE profile model# pdw8280n00ss is not draining at all. I followed the instructions on another thread and cleaned the sump and the drain hole. But it still does not drain.

While cleaning i noticed a rubber flap kind of thing in the plastic/rubber pipe that the fine screen fits into. I am not sure if that is the cause of the issue but please help me! This is a fairly new dishwasher and everything else seems to be working except for the draining issue.

Satish