@zhangxm, I've tried the new zip and I still get the same error message. This is on iPhone simulator.
I do get some messages in the debug console:
ar: attachRequest: address: 192.168.177.14 port: 5086
ar: attachRequest: connected
I could send you my test project and see if that works on your machine.
For other people that want to try this out:
Check the path of your cocos install with 'which cocos', normally when running setup.py and use source ... afterwards the path is changed, but I had to use source bash_profile as well before the path changes took effect.