whirlpool ADP4500 dishwasher?

Hi I have a whirlpool ADP4500 dishwasher
I switch it on and the pump starts to drain the dishwasher after about a minute
the green light starts to flash, I have held this button in for around 3 seconds then
changed to another program cycle but it just dose the same ie:- it starts to pump out the water thats in the dishwasher about a minite later the green light starts to flash
Can you please help
PS
I have cleaned the filter