[Source SDK] Path_track issue

[CrazyMan]

Hey,guys
Im working with EP2 SP Engine,and i want to fly an helicopter to a path_track. Well that worked,but the problem is,when i want it to fly it on trigger,then it wont work.It just begins when I'm spawning on the map,and i want it to make it triggerable. Anybody know how?

[Dives]

On the train, set "Initial speed" to 0. On the trigger, output to the train "start forward".

[CrazyMan]

Well,in the output for the npc_helicopter there is NOT an ''Start Forward'' option.So i dont know what do next.