How do I implement MVVM Light Toolkit EventTrigger

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Visual-Studio

XAML

WPF

MVVM

I am trying to implement a Button in a WPF project, which sets a variable to 1 by clicking and back by releasing the button. Since I found no way to bind to MouseDown and MouseUp directly. I am trying to go with MVVM Light Toolkit, but it is not working. Does anyone know to handle this? VS2013 WPF4.5

My DLLs from MvvmLightLibs.4.2.30.0:

GalaSoft.MvvmLight.Extras.WPF45
GalaSoft.MvvmLight.WPF45
System.Windows.Interactivity

My XAML:

<UserControl x:Class="PMWA.View.OperatorView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
             xmlns:cmd="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.WPF45">
    <Grid>
                <Button  x:Name="MoveUp"
                         Content="Up"
                         Margin="5">
                    <i:Interaction.Triggers>
                        <i:EventTrigger EventName="MouseDown">
                            <cmd:EventToCommand Command="{Binding MoveUpCommand}"/>
                        </i:EventTrigger>
                        <i:EventTrigger EventName="MouseUp">
                            <cmd:EventToCommand Command="{Binding StopMoveCommand}"/>
                        </i:EventTrigger>
                    </i:Interaction.Triggers>
                </Button>
                <Button x:Name="MoveDown"
                        Content="Down"
                    <i:Interaction.Triggers>
                        <i:EventTrigger EventName="MouseDown">
                            <cmd:EventToCommand Command="{Binding MoveDownCommand}" />
                        </i:EventTrigger>
                        <i:EventTrigger EventName="MouseUp">
                            <cmd:EventToCommand Command="{Binding StopMoveCommand}" />
                        </i:EventTrigger>
                    </i:Interaction.Triggers>
                </Button>
                <Button  x:Name="Apply"
                         Content="Apply"
                         Command="{Binding ApplyDistanceCommand}"
                <TextBox x:Name="Distance"
                         Text="{Binding CurrentDistance}"
    </Grid>
</UserControl>

Hier is my ViewModel:

private ICommand moveUpCommand;
public ICommand MoveUpCommand
{
    get
    {
        if (moveUpCommand == null)
        {
            moveUpCommand = new RelayCommand(p => ExecuteMoveUpCommand());
        }
        return moveUpCommand;
    }
}
private void ExecuteMoveUpCommand()
{
    Trace.WriteLine("Move Up");
    SetPort1(1);
}

And the binding is set up in MainWindow.xaml.cs like this:

private void SetupBindings()
{
    var operatorModel = new Model.Operator();
    operatorView.DataContext = new OperatorViewModel(operatorModel, measurementWeightListViewModel);
}

I have i third button which works fine but those up and down buttons wont do anything :(

I messed up in this thread, so i posted it here:

MVVM Light Toolkit EventTrigger binding doesnt work[^]