my guess is, that on load of step.rc SystrayCurrentWidth isn't set (it is for use in scripts etc. I guess). I don't think it will work, as you wan't it to either (if you want the systray to automaticly move according to it's width) because the SystrayX is only read when you run step.rc which is only at !re* and it doesn't change dynamicly. What you want to do is (as a conclusion to an earlier thread) to set SystrayX -64. This will do the job (you don't have to set systraywidth) and the systray will automaticly be snapped to the right edge of yout screen.