I used the rail lube once, and that was the first year I had the bow. That could be the problem, but I don't think it would be. I'm getting it checked tomorrow, and I hope we find out the problem. If not I'd have to get a new bow and site it in the day I get it so I can get back out in the woods. I'd hate to have to get a new bow, but if it comes down to it, I guess I'll have to. If this ever happened to you and you fixed it, please let me know what you did. I'd like to have this bow for a few more years because it was considered the top crossbow in 2004.