CCScrollView with CCMenu priority

I create a scrollview, need menuitem to response events. After added this operations, i found when i scroll above menuitem, the scrollview doesn’t scroll, and scroll other district except menuitem area, it works ok.
I override CCMenu like this:
———————————————————
class MyMenu: public CCMenu
{
public:

virtual void registerWithTouchDispatcher()
{
CCDirector* pDirector = CCDirector::sharedDirector();
pDirector~~>getTouchDispatcher~~>addTargetedDelegate;
}
};
———————————————————————
CCMenuItemImage *item1 = CCMenuItemImage::create);
item1~~>setTag;
CCMenu *menu = MyMenu::create;
menu~~>setPosition(ccp(visibleSize.width * (i + 0.5f), visibleSize.height / 2));
pLayer~~>addChild;
——————————————————~~

When i add break point in MyMenu::registerWithTouchDispatcher()
the break point doesnot steps in.

How can i scroll above menuitem?