Repaired bed hinge dilemma

The long piano hinge on the queen sized bed bit the dust. I replaced the old hinge with no trouble. When I hooked up the lift support strut that holds the bed up to get into the storage underneath, I could NOT pull the bed back down. I was on the verge of pulling the screws loose that were holding the brackets of the strut. It worked fine before, but now I cannot compress them at all. I took one outside and put one end on the concrete and tried to compress it with no luck.

Am I missing something?

Thanks,eh?

Brad