env_soundscape + trigger doesnt work.

[stukabomber44]

I'm trying to make a spooky scene where you hear the sound of a scream in a dark room, however I don't hear it. When I look in the console it says :


Empty ambient_generic (ambient_generic) at 4112.00, -4688.00, 400.00
Empty ambient_generic (ambient_generic) at 4080.00, -4800.00, 416.00
Empty ambient_generic (ambient_generic) at 4112.00, -4746.00, 382.00

the sound I'm trying to use it

ambient/creatures/town_child_scream1.wav

(this is a hl2 sound wav too, not my own)

can you provide directions how to make this trigger properly and be able to hear it??