[cocos2dx-js sdk 集成] PocoManager is not a constructor

已经将poco-sdk放入游戏目录，在main.js里 加入了

var PocoManager = window.PocoManager;
var poco = new PocoManager() ;
window.poco = poco;

执行后产生 PocoManager is not a constructor 此错误，想请教步骤是否有误?

project.json 也已经加入
"src/lib/Poco/sdk/AbstractDumper.js",
"src/lib/Poco/sdk/AbstractNode.js",
"src/lib/Poco/sdk/Attributor.js",
"src/lib/Poco/sdk/DefaultMatcher.js",
"src/lib/Poco/sdk/IScreen.js",
"src/lib/Poco/sdk/Selector.js",
"src/lib/Poco/Cocos2dxNode.js",
"src/lib/Poco/Cocos2dxDumper.js",
"src/lib/Poco/POCO_SDK_VERSION.js",
"src/lib/Poco/Poco.js"