problem white utf8

Hi
how to use utf8 and rtl in qtopia aplication.
writing and testing this code but not working But working in my pc 

#include <qapplication.h>
#include <qpushbutton.h>
#include <qfont.h>
#include <qlineedit.h> 
#include <qdialog.h>
#include <qstring.h> 



int main( int argc, char **argv )
{
    QApplication a( argc, argv );
    QDialog form1;
    
    QPushButton quit( QString::fromUtf8("&#1582;&#1585;&#1608;&#1580;"),
&form1,"quit" );
    QPushButton clean( "Clean", &form1, "clean");

    quit.resize( 75, 30 );
    quit.setFont( QFont( "font/tahoma.ttf", 18, QFont::Bold ) );

    line.setGeometry( QRect( 0, 0, 137, 25 ) );
    quit.setGeometry( QRect( 7, 86, 60, 25 ) );
    clean.setGeometry( QRect( 70, 86, 60, 25 ) );

    QObject::connect( &quit, SIGNAL(clicked()), &a, SLOT(quit()) );
    QObject::connect( &clean, SIGNAL(clicked()), &line, SLOT(clear()) );
    
    a.setMainWidget( &form1 );
    form1.show();
    return a.exec();
}