Problems with setCentralWidget

[Rockem]

Hello all,

I have this code

class QTWindowView : public WindowView, public QTextEdit{
public:
	QString getText() const;
	void setText(const QString & text);
};

class QTWindowView : public WindowView, public QTextEdit{
public:
	QString getText() const;
	void setText(const QString & text);
};

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and when I try to setCentralWidget with this class on QMainWindow
I get a segmentation fault.
whats more, on Windows the code DOES work, but on linux
it crash

any suggestions ?
Eli