c# - Caliburn.Micro: Combobox is not populated

Question

I have a WPF application with Caliburn.Micro. I am trying to populate a new combobox I just added, but it stays empty, though the other comboboxes on the same view are populated. I debuged, so I know that the GeorgaphyNames source collection in the ViewModel is populated correctly. Could you please help?

Here is my code:

Model:

public class GeographyName : PropertyChangedBase
{
    private string _name;
    public string Name
    {
        get { return _name; }
        set
        {
            if (_name == value) return;
            _name = value;
            NotifyOfPropertyChange(() => Name);
        }
    }
  ...
}

View:

            <ComboBox Grid.Row="6" Grid.Column="1" Name="GeographyNames" DisplayMemberPath="Name" SelectedValuePath="Name" SelectedItem="SelectedGeographyName" Style="{StaticResource DetailCombo}" />

ビューモデル:

    private BindableCollection<GeographyName> _geographyNames;
    public BindableCollection<GeographyName> GeorgaphyNames
    {
        get { return _geographyNames; }
        private set
        {
            if (_geographyNames == value)
                return;
            _geographyNames = value;
            NotifyOfPropertyChange(() => GeorgaphyNames);
        }
    }


    private GeographyName _selectedGeographyName;
    public GeographyName SelectedGeographyName
    {
        get { return _selectedGeographyName; }
        set
        {
            if (_selectedGeographyName == value)
                return;
            _selectedGeographyName = value;
            NotifyOfPropertyChange(() => SelectedGeographyName);
            IsModified = true;
        }
    }

コンボボックスは、別のコンボボックスで選択を変更すると取り込まれます:

    private Ldc _selectedLdc;
    public Ldc SelectedLdc
    {
        get { return _selectedLdc; }
        set
        {
            if (_selectedLdc == value)
                return;
            _selectedLdc = value;
            NotifyOfPropertyChange(() => SelectedLdc);
            if (SelectedLdc != null)
            {
                GeorgaphyNames = GeographyName.GetData(SelectedLdc.LdcId);
            }
            IsModified = true;
        }
    }