After I gave my reply last time I realized that you said it was stuck and couldn't move it. So I guess my advice won't work. Can you just break the F***er off then try and put a new one on. I know that when those things go on coats, my jeep, pants, whichever, people tend to think they need a new zipper, when in fact it is just the little slider. If it was me I would break it off anyway I could, hacksaw, bolt cutters, wire snips. If you are going to replace it eventually I would try and break it off first. Good Luck, and let us know what happened.