CCLayer can't load

[kavenGw]

hello everyone,I'm new in cocosbuilder,so I write a demo refer to the cocosexample,I use cocos2d-x-3.0alpha1 and cocosbuilder3.0-alpha5. but the CCLayer I create in the cocosbuilder can show in the simulator. but the ccNodeLoaderLibrary->registerNodeLoader("HelloCocosBuilderLayer", HelloCocosBuilderLayerLoader::loader()) not run。 no errors,just the layer I register not create. but if I use the resources in the cocos2d-x-3.0alpha,the layer can create. this has disturb me for a long time.