QSystemTrayIcon and Windows8

QSystemTrayIcon and Windows8

I writing app and have strange bug in tray class. Inside my class I using
QSystemTrayIcon like
tray = new QSystemTrayIcon(this);
tray->setIcon(QIcon(":/gui/logo.png"));
...
tray->show();
On WinXP and Windows7 it's working properly, but on Windows 8 icon is not
displayed
qDebug()<<"System TRAY:"<< QSystemTrayIcon::isSystemTrayAvailable();//
outputs true
I use Qt5.1.1 MSVC 2012