Strange! Lost sound only in "Release" mode (Win8)

Hello

I have a very strange error in Windows 8 project using cocos2dx.

The “playEffect” works only in Debug mode. I can hear the sound.
It does not work in Release mode. I can not hear any sound.

Can anybody give me some advice to solve this issue?
Thank you in advance.

tmd

Anybody knows why? Thank you.