Like Zachariah says, this is almost surely a wireless drawbar issue. If the drawbar is fully engaged and not lifted out of alignment, the top suspect is a broken wire under the heatshrink on one side or the other. I've personally had more broken wires under the tender heatshrink, but it can happen on either side.
Just tug on each wire where it comes out from under the heatshrink, if the wire comes out, you have found your problem. In that case, cut away the heatshrink, fix the wire, and install a new piece of heatshrink.
