I have looked in the forums and could not find what i was needing. This is what is going on. First the script works only when it wants to:

(script startup effects
(sleep_until (= (device_group_get emitter) 1) 15)
(effect_new "effects\explosions\large explosion" flag1)
(object_destroy beam-1)
)

The first time i did this script it worked just fine. I restarted the level and it would no longer work. I went back and fourth so many times until it all of a sudden worked but then again stoped. it got to the point i was frustrated and kept hitting "E" and the script fired. Again i restarted the level and it would not work. So again i kept hitting the "E" button and it worked. This is for a SP map. What am i missing in the script so it will work the one time i hit the "E" button. it seems to me that it is not syncing or something. Any ideas on how i can fix this.

What happens is this. You hit the switch and it will cause an explosion and the beam emitter will stop.

Thanks