about cocosbuilder

I am trying to use ccbreader to accelerate my coding.
I write this code:

ccNodeLoaderLibrary~~>registerCCNodeLoader);
/* Create an autorelease CCBReader. /
cocos2d::extension::CCBReader
ccbReader = new cocos2d::extension::CCBReader;
/* Read a ccbi file. /
CCNode
node = ccbReader~~>readNodeGraphFromFile(“ccb2/HelloCocosBuilder.ccbi”, this);

ccbReader->release();

but I get a problem: when the “HelloCocosBuilder.ccbi” is copy from example in directory TestCpp,everything OK.But when I using my “HelloCocosBuilder.ccbi”, HelloCocosBuilderLayerLoader will be replace by CCNodeLoader in function CCNode * CCBReader::readNodeGraph, and I found that using example’s ccbi, the variable “className” in function CCNode * CCBReader::readNodeGraph is “HelloCocosBuilderLayer”,and if I using my ccbi,the variable is “CCLayer” and I don’t know what is wrong.
I will be appreciate if anyone give me a suggest.