SimpleAudioEngine loop effect stops

Hi guys,
I have a problem with the loop sound effects:(
it seems to working fine.but after a while it stops.I just can hear nothing.
did you have this same issue?

What’s the engine version?
What platform did you test on?
Did you run SimpleAudioEngineTest?

Sorry, I should write it into the question :frowning:
cocos2d-1.0.1-x-0.11.0
I tested it on iphone 3gs.
I didn’t run SimpleAudioEngineTest.

CocosDenshion::SimpleAudioEngine::sharedEngine()->playEffect("waterfall.wav", true);