problem in QProgressBar setStyleSheet

[wagmare]

hi friends,

in dialog.cpp

progressbar = new QProgressBar();
        label1 = new QLabel("please wait ...");
        progressbar->setTextVisible(false);
 
//for progressbar
        setStyleSheet("QProgressBar {border: 1px solid grey; border-radius: 8px;padding: 1px }"); 
 
//for chunk
     setStyleSheet("QProgressBar::chunk {background: qlineargradient(x1: 0, y1: 0.5, x2: 1, y2: 0.5, stop: 0 red, stop: 1 white); }");

progressbar = new QProgressBar();
        label1 = new QLabel("please wait ...");
        progressbar->setTextVisible(false);

//for progressbar
        setStyleSheet("QProgressBar {border: 1px solid grey; border-radius: 8px;padding: 1px }"); 

//for chunk
     setStyleSheet("QProgressBar::chunk {background: qlineargradient(x1: 0, y1: 0.5, x2: 1, y2: 0.5, stop: 0 red, stop: 1 white); }");

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but here only one stylesheet is working at a time ... it QProgressBar::chunk stylesheet only works in my code .. if i commented the QProgressBar::chunk stylesheet ,, QProgressBar style sheet is working ... how can i modify both at a time ...?
please help ..