EventToCommand missing

Jun 20, 2013 at 11:46 AM
I have a problem accessing the EventToCommand in my WPF4 application. It seems it is not accessible from the namespace I included.

I added the references by using NUGET.

The references GalaSoft.MvvmLight.Extras.WPF4, GalaSoft.MvvmLight.WPF4 and System.Windows.Interactivity were added.

In my .xaml I included
xmlns:cmd="namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.WPF4"
I want to add a trigger to a textbox, something like:
<TextBlock Text="A command" >
  <i:Interaction.Triggers>
     <i:EventTrigger EventName="MouseDown">
        <cmd:EventToCommand Command="{Binding DoActionCommand}"/>
     </i:EventTrigger>
  </i:Interaction.Triggers>
</TextBlock>
However the EventToCommand is not recognized. (and I don't get IntelliSense from cmd:

Can someone help?