3d sound issue

[Homer]

Heres my trigger

Spoiler

heartbeat
    Events
        Time - Every 2.00 seconds of game time
    Conditions
    Actions
        Sound - Attach heartbeat <gen> to Killer 0032 <gen>
        Sound - Play heartbeat <gen>

Im trying to make the heart beat play at the location of the killer. However I cannot make it play as a 3d sound. I can do a normal sound fine. But when I check the 3d sound option and do this it does not work. Any suggestions? any tutorials I can be linked to?

 

[Kazuga]

Use the action Sound - Play sound at point (Your unit)