diff --git a/DaSaSo.Wpf/Controls/MainWindowNavigationBar.xaml b/DaSaSo.Wpf/Controls/MainWindowNavigationBar.xaml
index 73b131d..fed2d8c 100644
--- a/DaSaSo.Wpf/Controls/MainWindowNavigationBar.xaml
+++ b/DaSaSo.Wpf/Controls/MainWindowNavigationBar.xaml
@@ -23,10 +23,10 @@
             <RowDefinition Height="auto" />
             <RowDefinition Height="auto" />
         </Grid.RowDefinitions>
-        <RadioButton Grid.Row="0" IsChecked="{Binding CurrentViewModel, Mode=OneWay, Converter={StaticResource EqualValueToParameterConverter}, ConverterParameter={x:Type viewmodel:ClientListViewModel}}" Content="Kunden" Style="{StaticResource ToggleButtonList}" Command="{Binding UpdateCurrentViewModelCommand}" IsEnabled="True" CommandParameter="{x:Static nav:EMainWindowViewType.Clients}"/>
-        <RadioButton Grid.Row="1" IsChecked="{Binding CurrentViewModel, Mode=OneWay, Converter={StaticResource EqualValueToParameterConverter}, ConverterParameter={x:Type viewmodel:ProjectListViewModel}}" Content="Projekte" Style="{StaticResource ToggleButtonList}" Command="{Binding UpdateCurrentViewModelCommand}" CommandParameter="{x:Static nav:EMainWindowViewType.Projects}" />
-        <RadioButton Grid.Row="2" IsChecked="{Binding CurrentViewModel, Mode=OneWay, Converter={StaticResource EqualValueToParameterConverter}, ConverterParameter={x:Type viewmodel:BuildingsiteListViewModel}}" Content="Baustellen" Style="{StaticResource ToggleButtonList}" Command="{Binding UpdateCurrentViewModelCommand}" IsEnabled="{Binding CanSelectBuildingSite}" CommandParameter="{x:Static nav:EMainWindowViewType.Buildingsites}" />
-        <RadioButton Grid.Row="3" IsChecked="{Binding CurrentViewModel, Mode=OneWay, Converter={StaticResource EqualValueToParameterConverter}, ConverterParameter={x:Type viewmodel:SewerObjectListViewModel}}" Content="Objekten" Style="{StaticResource ToggleButtonList}" Command="{Binding UpdateCurrentViewModelCommand}" IsEnabled="{Binding CanSelectSewerObjects}"  CommandParameter="{x:Static nav:EMainWindowViewType.SewerObjects}" />
+        <RadioButton Grid.Row="0" IsChecked="{Binding CurrentViewModel, Mode=OneWay, Converter={StaticResource EqualValueToParameterConverter}, ConverterParameter={x:Type viewmodel:ProjectListViewModel}}" Content="Projekte" Style="{StaticResource ToggleButtonList}" Command="{Binding UpdateCurrentViewModelCommand}" CommandParameter="{x:Static nav:EMainWindowViewType.Projects}" />
+        <RadioButton Grid.Row="1" IsChecked="{Binding CurrentViewModel, Mode=OneWay, Converter={StaticResource EqualValueToParameterConverter}, ConverterParameter={x:Type viewmodel:BuildingsiteListViewModel}}" Content="Baustellen" Style="{StaticResource ToggleButtonList}" Command="{Binding UpdateCurrentViewModelCommand}" IsEnabled="{Binding CanSelectBuildingSite}" CommandParameter="{x:Static nav:EMainWindowViewType.Buildingsites}" />
+        <RadioButton Grid.Row="2" IsChecked="{Binding CurrentViewModel, Mode=OneWay, Converter={StaticResource EqualValueToParameterConverter}, ConverterParameter={x:Type viewmodel:SewerObjectListViewModel}}" Content="Objekten" Style="{StaticResource ToggleButtonList}" Command="{Binding UpdateCurrentViewModelCommand}" IsEnabled="{Binding CanSelectSewerObjects}"  CommandParameter="{x:Static nav:EMainWindowViewType.SewerObjects}" />
+        <RadioButton Grid.Row="3" IsChecked="{Binding CurrentViewModel, Mode=OneWay, Converter={StaticResource EqualValueToParameterConverter}, ConverterParameter={x:Type viewmodel:ClientListViewModel}}" Content="Kunden" Style="{StaticResource ToggleButtonList}" Command="{Binding UpdateCurrentViewModelCommand}" IsEnabled="True" CommandParameter="{x:Static nav:EMainWindowViewType.Clients}"/>
         <RadioButton Grid.Row="4" IsChecked="{Binding CurrentViewModel, Mode=OneWay, Converter={StaticResource EqualValueToParameterConverter}, ConverterParameter={x:Type viewmodel:ImpregnierungListViewModel}}" Content="Imprägnierungen" Style="{StaticResource ToggleButtonList}" Command="{Binding UpdateCurrentViewModelCommand}" CommandParameter="{x:Static nav:EMainWindowViewType.Impregnierung}" />
         <Border Grid.RowSpan="5" Background="LightBlue"  Visibility="{Binding CurrentViewModel, Mode=OneWay, Converter={StaticResource EqualValueToBooleanConverter}, ConverterParameter={x:Type viewmodel:SewerMainListViewModel}}" d:Visibility="Hidden">
             <TextBlock Foreground="WhiteSmoke" FontSize="18" Text="Editing Sewer" />