Away to know for sure camper is hitch right?
I'll certainly agree with most of these posts. I have seem many times where folks DO NOT attach the hitch correctly. The receptacle is merely setting on top of the ball. There should be about 1/4 to 1/2" clearance between your hitch and the ball mount when properly connected. The hitch has to go down over the ball. Quite frequently, the release trigger will be in the way and you will have to ascertain that it is free and clear to allow the hitch to smoothly drop down over the ball. Being it is a pop up, once connected and before doing anything else, grab the tounge and try to bounce the hitch off the ball. If it comes off, it was not hooked up... Check for the clearance between the tounge and the ball mount. just remember 1/4 to 1/2", anything more, it is not connected. Good luck.