Can't Bind ContextPresenter.ContentTemplate

Can't Bind ContextPresenter.ContentTemplate

I wanna Bind the ContentTemplateProperty of ContentPresenter :
<ContentPresenter Grid.Row="2" Grid.ColumnSpan="3"
Content="{Binding ExtraConsole.ViewModel,
UpdateSourceTrigger=PropertyChanged}"
ContentTemplate="{Binding
Source=ExtraConsole.DataTemplate,
UpdateSourceTrigger=PropertyChanged}"
x:Name="ParametersContent"/>
I change the ExtraConsole.DataTemplate And Notify its Property Changed
but no changes happen to UI .
Any suggestions?