well at first it was just sticking a lil bit but now it s jammed shut and i cant get it opened...i took the door apart but i couldnt find any thing wrong with it can you help ??????

change the rollers on the door, taking it apart and looking at checking is one thing. but it need to be under presser, if it rolls but just getting stock, then you may need to change out the hole lock unit or it just might need to be lubed up.
all so with the took off check the track as well there might be a brake in it as well.