QScript + SimpleClass not working

[tdt]

Hi all,
i have simple class which is used in QScript

//-------------------------------- myobject.h----------------------------
class MyObject : public QObject
{
        Q_OBJECT
public:
 
	MyObject(QObject *parent = 0);
 
	Q_SCRIPTABLE int intern;
	Q_INVOKABLE QString name();
	Q_INVOKABLE int add(int b=0);
 
	Q_INVOKABLE bool operator==(const MyObject &second) const;
	Q_INVOKABLE MyObject operator+(int b);
 
	~MyObject();
};
//-------------------------------- myobject.cpp----------------------------
MyObject::MyObject(QObject *parent)
: QObject(parent)
{
	this->intern=0;
}
MyObject::~MyObject()
{	
};
QString MyObject::name()
{	return QString("MyObject");
};
int MyObject::add(int b)
{	this->intern=this->intern+b;
	return this->intern;
};
 
bool MyObject::operator==(const MyObject &second) const
{	return this->intern==second.intern;
}; 
MyObject MyObject::operator+(int b)
{	this->intern=this->intern+b;
	return this;
} ;

//-------------------------------- myobject.h----------------------------
class MyObject : public QObject
{
        Q_OBJECT
public:

	MyObject(QObject *parent = 0);
	
	Q_SCRIPTABLE int intern;
	Q_INVOKABLE QString name();
	Q_INVOKABLE int add(int b=0);

	Q_INVOKABLE bool operator==(const MyObject &second) const;
	Q_INVOKABLE MyObject operator+(int b);

	~MyObject();
};
//-------------------------------- myobject.cpp----------------------------
MyObject::MyObject(QObject *parent)
: QObject(parent)
{
	this->intern=0;
}
MyObject::~MyObject()
{	
};
QString MyObject::name()
{	return QString("MyObject");
};
int MyObject::add(int b)
{	this->intern=this->intern+b;
	return this->intern;
};

bool MyObject::operator==(const MyObject &second) const
{	return this->intern==second.intern;
}; 
MyObject MyObject::operator+(int b)
{	this->intern=this->intern+b;
	return this;
} ;

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and executing code

Q_SCRIPT_DECLARE_QMETAOBJECT(MyObject, QObject*);
...
	QScriptEngine eng;
 
 
	QScriptValue fClass = eng.scriptValueFromQMetaObject<MyObject>();
	eng.globalObject().setProperty("MyObject", fClass);
 
	qDebug()<<"var a=new MyObject()"<<eng.evaluate("var a=new MyObject()").toString();
	qDebug()<<"a.name()"<<eng.evaluate("a.name()").toString();
	qDebug()<<"a.intern=3"<<eng.evaluate("a.intern=3").toString();
	qDebug()<<"a.intern"<<eng.evaluate("a.intern").toString();
	qDebug()<<"a.add(5)"<<eng.evaluate("a.add(5)").toString();
	qDebug()<<"a.intern"<<eng.evaluate("a.intern").toString();

Q_SCRIPT_DECLARE_QMETAOBJECT(MyObject, QObject*);
...
	QScriptEngine eng;

	
	QScriptValue fClass = eng.scriptValueFromQMetaObject<MyObject>();
	eng.globalObject().setProperty("MyObject", fClass);

	qDebug()<<"var a=new MyObject()"<<eng.evaluate("var a=new MyObject()").toString();
	qDebug()<<"a.name()"<<eng.evaluate("a.name()").toString();
	qDebug()<<"a.intern=3"<<eng.evaluate("a.intern=3").toString();
	qDebug()<<"a.intern"<<eng.evaluate("a.intern").toString();
	qDebug()<<"a.add(5)"<<eng.evaluate("a.add(5)").toString();
	qDebug()<<"a.intern"<<eng.evaluate("a.intern").toString();

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In my opinion should be variable a represents class MyCObject and a.intern should be 3+5
it is not
is it right or bug? please send any idea you have

thanks
TDT

PS: is it possible override operator+ inside qscript?
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working on wxp, VS express 2008+QT4.5.0