Need help emulating a slide function on a smartphone in SL360

I have emulated a user sliding a graphic to the left on a smartphone. I do it with a trigger "when the user drags Picture 2 over Rectangle 1." This advances the user to the next slide. It works perfectly once. But when I attempt to do the exact same trigger on a later slide, it doesn't work. I set both slides to reset to initial state. But still the first slide works perfectly. but the second one doesn't. Any suggestions?