Problems with Demco Autoslider not hitching

I know it shouldn't have matter but this was one of the options the tech guy told me to try. There is something on the hitch that is off angled by a hair to be causing this. Like i said before, i can hold the head of the hitch in my hands and push it against the pin and it closes all the way, every time. I've lowered the 5th wheel down and glide the pin box up onto the hitch and it still doesn't hitch correctly. I'm pretty sure its not the head of the hitch because i have tried a replacement with the same results. I have Houdini lubricant i'm going to try. It doesn't gum up like WD40.