Detergent dispender will not open

I have replaced the detergent dispenser and it still does not open during the wash cycle. Nothing is blocking it. Any ideas?

If you replaced the whole detergent dispenser assembly and did it right way with the correct part, then the problem more likely is a bad control board.

Here are the breakdown diagrams and Replacement parts for WHIRLPOOL KUDS01FLSS0 Dishwasher | AppliancePartsPros.com

Gene.