Shifter Knob - I Messed Up Something Simple!

Well I really messed up. I was re-installing the center console on my 67 barracuda and screwed down the shifter knob too tight. Now it will not loosen and it is down too far to allow for the shifting. The cable just turns and will not break free from the button.

Any ideas on how to get the button to unscrew from the cable? I have the set screw completely out and the knob will turn.