cocos2d-x 2.0 sprite sheet problem

cocos2d-x 2.0 sprite sheet problem
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I am using the cocos2d-x 2.0 and trying to use the sprite sheet to run the animation.

CCSprite* spriteAnim = CCSprite::spriteWithSpriteFrame

The code just add the animation sprite in the layer. But the animation sprite have not run.
How can i run the sprite sheet?

Thanks you.