GE sounds suddenly stops .

hi there, im working on a game called the cure(more info here
ive got a problem, when the highlight of the scene happens, the sounds all shut of, i dont know why, and ive been checking every problem theres to check, but i cant find out whats wrong.
when i change the timer to start the musik and the terrifying screams at 150 seconds, it shuts off after about 5 seconds, but bot when i set the timer on 5 seconds.
the same problem is about the scary ambience, its on “loop stop” until 150 seconds, but it stops after about 20 seconds.
heres the .Blend file, copyright: me!