Replying to Binding problem

Today i lost the screw in by bindings tail piece. I had lost one before so now i have only one screw holding the tail piece attached to the ski. I tried screwing it back before, but it kept coming out pretty quickly. So what should i do? I was thinking of getting a new screw and putting it in with some glue. Will that work? And how safe is it to ride with one screw in the tail piece (the piece only moves up and down slightly, so i guess i'll be okay for a couple of days)