QCompass does not work

Run a very simple program which uses QCompass:
===
#include <QtCore>
#include <QCompass>
QTM_USE_NAMESPACE
class Filter : public QCompassFilter
{
public:
bool filter(QCompassReading *pReading)

{ qDebug() << "Compass Calibration Level:" << pReading->calibrationLevel() << "Azimuth:" << pReading->azimuth(); return false; // don't store the reading in the sensor }

};
int main(int argc, char **argv)
{
QCoreApplication app(argc, argv);
QCompass compass;
Filter filter;
compass.addFilter(&filter);
compass.start();
if (!compass.isActive())

{ qWarning("Compass did not start!"); return 1; }

return app.exec();
}
===
Expected result: Azimuth info should be printed to the console when rotating the device.
Actual result: The following is printed in the console:
===
Setting up compass (0.0.1) ...
loaded the Generic plugin
loaded the Maemo 6 plugin
New control sensor "compasssensor" interface created with session id 8 ...
Object::connect: No such signal CompassSensorChannelInterface::levelChanged(const int&) in maemo6compass.cpp:56
Object::connect: No such signal CompassSensorChannelInterface::degreesChanged(const int&) in maemo6compass.cpp:57
Setting data rate 43 Hz (interval 23 ms) for "compasssensor"
===
and no azimuth info is reported.