It sounds to me that the old wire inside the 'kink' is probably just brittle and has broken. Temporarily, you might try just getting the wire into a position where it works and then "splinting" it in that position with a little piece of wood and some tape--may or not work. You reallly just need a new cord. Or, someone with a little electrical knowhow could cut out the kink part and splice the two wires inside together. Good luck.