1999 Plymouth Breeze liftgate

I have power windows, door locks and back liftgate all operate by remote. Untill latley all worked fine than one day the liftgate stoped working with remote, the key wont work their is something blocking the key from complete insertion. When I use my remote I can here a click noise, something moving inside the door but it will not open. Any ideas what has happened, or how can I open the liftgate. Thank U!