right, to set up a trigger zone, you need to...
1. place a trigger zone.
2. change the main ai script of the trigger zone to zoneactivate.fpi.
3. on the trigger zone, where it says: "if used", type the word: "enemy".
4. place a character somewhere on your map.
5. change it's name to enemy.
6. set it so spawn at start =no, and spawn after delay =yes.
7. make sure the "isimmoblie" setting reads NO.
that will do it.
if it's still not working, what version of fpsc are you using?
what update?
when you made the room, did you put whole segments in or just the floor models?
i like apple juice. (the mod and the drink)