Stroking not working on CCLabelTTF in cocos2d-x ios in c++

cocos2d-x C++
#1

I am tryng to make an outline of green color in my label but its not working… my code is

CCLabelTTF* pLabel = CCLabelTTF::create("Hello World", "HoboStd", 50);
pLabel->setPosition(ccp(200,200));
pLabel->enableStroke(ccGREEN, 5.0,true);
this->addChild(pLabel);