sprite drawing problem (cocos2d-2.1beta3-x-2.1.1)

I am new for cocos2d-x, now I am developing a game on IOS which content a tiled map background and add some sprite on it. The problem is when I scroll the background, the sprite on the map will be broken just like the image I attached.
I estimate it is because memory problem. Is anyone got the same problem?:frowning:


2013-05-06 19.41.20.png (72.3 KB)

Check http://www.cocos2d-x.org/boards/6/topics/27620

Solved by try to put this: CCDirector::sharedDirector()->setProjection(kCCDirectorProjection2D); to my AppDelegate::applicationDidFinishLaunching()

Thanks Leszek S