door glass help!!

Ok, I am almost at my wits end with a drivers side door glass. It's either a 67 or 69 door I am trying to get it out of. 68's had the lower vents and this one doesnt have it. Anyway the only thing that seems to be holding it is the front channel it rides up and down in. Regulator is out, but the channel that is attached to the bottom of the glass is still there. I can only get the window down but 2". There is plastic clips in the channel attached to the glass. I think they wrap around the glass. How do I get those little f'rs out????

Thanks
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