Re: ezloader trailer hitch problems??
lift the trailer up , make sure the lock lever is all the way up and the fingers , that go under the ball are all the way back,set it back down and see if it will lock.
a little grease or WD40 may be called for

sounds like the lock was not all the way open and you set it down on the fingers OUCH!

(the trailer lock , not yours)
woosterken