Window Regulator problem

[GSpreeman]

Hey guys, I have a '65 356C and thought you might have the same kind of window regulators...manual, with a crank. I am piecing my car back together after a complete strip. I put the chrome back in around the window and when I go to crank up the window, I turn the crank about 1/2 turn and the window wants to move backwards (towards the back of the car), not up or down. Checked the gears, all the teeth are fine. This all started when I lowered the window as far as I could to get some chrome trim in.

Any ideas of what I screwed up?

Thanks all,

Greg
'65 356SC