@pandamicro Thanks great, i double checked the build.xml, i found some cocos2d lib files were annotated including the CCClippingNode.js, i corrected all these lines and it worked. I have to say, the build.xml was copied from the official sample game, i didn't know i should edit the xml for myself.
So, thanks for you patience.
BTW: Another "null" error came after i switched the compress mode from simple to advanced, because the code was obscured on this mode, so i haven't know which line caused the problem. After all, on simple mode, it works perfectly! Let it be simple firstly!