How to replace stripped timer knob

How to replace stripped timer knob

TImer knob spins freely both ways. will not engage timer wheel beneath it to set spin or wash cycle. does not engage in either the in or out position. I know how to take top contol off but cannot release knob...please help

ANSWERS:

See if this video answers your question: http://www.youtube.com/watch?v=qqGys85pk...