As Matt suggested, if you can take a look at what is going on behind the door panel, then the problem should be tracked down. It might be as simple as a part that came loose. If not, then post what is holding things up and perhaps someone here can help you out.

On my '63 the problem turned out to be a broken latch release mechanism and the whole assembly had to be replaced. However, a call for help on this board resulted in finding the part at a reasonable price and freedom from having to open the window to let myself out by way of the exterior handle.

Best wishes,

Joe M