When I fully open the top on my 2008 XKR it operates fine and seems to settle in place fully open. However the two latches that hold the cover plate in place over the folded roof don't seem to lock. The only thing that seems to be holding everything in place is the hydraulic arm that opens and closes the cover. After about two minutes the pressure realizes in the hydraulic arm and the cover starts to open an inch or two. I can't seem to figure out how the two latches lock to hold the cover down... any thoughts our ideas would be appreciated