DOM XML reader - Not getting any proper output

Hi,
Below is my code & xml file. I am trying to read a xml file and store the contents. But its not working. Please help

Code:

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int ParseConfigFile::populateUserValues ( string &OS, string &dir, string &logPath )
{
    QDomDocument doc;
    QDomElement element;
 
    QFile file("config_v1.xml");
 
    if ( doc.setContent( file.readAll() ) == false )
        return 1;
 
    element = doc.documentElement();
 
    QDomNodeList list = element.childNodes();
    QDomElement firstChild = list.at(0).toElement(); // will return the first child
    QDomElement secondChild = list.at(1).toElement();
    QDomElement thirdChild = list.at(2).toElement();
 
    QString s1,s2,s3;
    s1 = firstChild.text();
    s2 = secondChild.text();
    s3 = thirdChild.text();
 
    OS = s1.toStdString();
    dir = s2.toStdString();
    logPath = s3.toStdString();
 
    return 0;
}

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