Check your drain hose, you may have some blockage or the hose is not able to drain correctly either because the drain trap has grease build up or the hose is not routed correctly. Put some drain cleaner down the sink drain that is connected to clean the trap or run a snake through it.

Also make sure the inside drain area is not clogged with large food pieces.

The dishwasher not draining page lists some additional issues that could be related.