Timer Replacement

How do I remove the knob on the timer? I have tried turning the knob counter clockwise while holding the back plate but nothing happens. I can get the control panel off of the top.

You can find some useful information in one of our previous threads: http://forum.appliancepartspros.com/washer-repair/10817-timer-dial-removal.html

Here are the breakdown diagrams and http://www.appliancepartspros.com/partsearch/model.aspx?model_id=257541&diagram_id=85788

Gene.