Hi, that happened to me last summer, I believe I lost all but one screw. Although, I use x2 model so I am not sure if they have the same type of screw. What I did is basically took it to bike shop where I bought 5 screws for a whopping $1 which were covered with this blue stuff that supposed to hold them in place. So far I didnt have any problems but I make sure that before every ride I check the tension on my cleat. For some reason Speedplays tend to do that but otherwise great pedal choice