That's what's wrong with mine. Some time before I bought it, someone partially broke the bottom brackets on the passenger side. I've been able to slide it back into place but it always slides out after a while. I want to try using some of that mold-able epoxy to fill the area where the bracket is supposed to be and insert the fastener into it so that it's glued to the cover. Then, once it all sets up, I can hopefully just plug the fasteners back into their holes and it'll be fixed. I need to get it off of the seat first, though, and I didn't want to break anything else while I was doing that, so thanks for the advice gcwimmer. I'll let you know if it works.