[Qt-interest] Signal Slot not working

[Matthias Pospiech]

I have a dll emitting error messages:

void QMicosPolluxController::Error(const char * errorMessage)
{
    emit errorOccurred(toQString(errorMessage));
}


which is handled in the gui (using the dll)
void DialogMicosController::connectSignalSlots()
{
    connect(controller, SIGNAL(errorOccurred(QString)), this, 
SLOT(OnControllerError()));
}
void DialogMicosController::OnControllerError(QString error)
{
    ui->labelError->setText(error);
}

However the function OnControllerError is never called.
If I copy all classes to the gui project (thus no dll), the effect is 
exactly the same.
The SLOT is never called.

Matthias