People keep spawning

In my map, after the orc burrow is destroyed, units are supposed to stop spawning at a certain location. But for some reason it doesnt work. The trigger is:

Event
-OrcBurrow001 dies
Action
-Turn off trigger spawn

hmmm
are you sure you,
1) choosed the right burrow
2)you turn off the right spawn trigger

if it still dont work make a condition in your spawn trigger

C: <burrow 001> is alife equal to true

From my experience, there is some problem with 'preplaced unit' dies events, among a few others involving preplaced units.

1 way to get around this, this is on-the-fly, mind you, is to do the following.

Create a region just large enough for each preplaced unit you are using. Create a trigger to pick random unit in region and put into a unit variable. [Works because there is only that one unit in the region.] Then change the trigger to a unit dies, unit = variable, turn off trigger.

It doesn't work and I got the right units and trigger.

I got it to work.