Invalid use of member XXXXXXX in static member function ?

[Terreox]

Hi there
i got some problem while programing. I created a new class called VehicleManager

class VehicleManager : public QDialog, public Ui::VehicleManager
{
public:
    VehicleManager(QWidget *parent = 0);
    static QList<Vehicle *> getVehicleList();
    static void initVehicleList();
    QList<Vehicle *> vehicleList;
};

class VehicleManager : public QDialog, public Ui::VehicleManager
{
public:
    VehicleManager(QWidget *parent = 0);
    static QList<Vehicle *> getVehicleList();
    static void initVehicleList();
    QList<Vehicle *> vehicleList;
};

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and tried to define getVehicleList()

QList<Vehicle *> VehicleManager::getVehicleList()
{
    return vehicleList;
}

QList<Vehicle *> VehicleManager::getVehicleList()
{
    return vehicleList;
}

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Now if i run the program it says:

PATH\vehiclemanager.h:-1: In static member function 'static QList<Vehicle*> VehicleManager::getVehicleList()':
PATH\vehiclemanager.h:30: Error:invalid use of member 'VehicleManager::vehicleList' in static member function
PATH\vehiclemanager.cpp:12: Error:from this location

At Line 30 in vehiclemanager.cpp there is "QList<Vehicle *> vehicleList;"
At Line 12 in vehiclemanager.cpp there is "return vehicleList;"

I dont understand this error.

Can someone help me?
Thanks

Greetz