Change the image source based on binded boolean

I have the Contact class:

public class Contact
{
    public Contact(Contact contact)
    {
        this.Username = contact.Username;
        this.GUID = contact.GUID;
        this.Msg = contact.Msg;
        this.Ring = contact.Ring;
    }

    public string Username { get; set; }
    public Guid GUID { get; set; }
    public bool Msg { get; set; }
    public bool Ring { get; set; }
}

This is the xaml:

        <ListView Grid.Row="1" Grid.Column="0" Name="ContactsListView" 
                      IsItemClickEnabled="True" 
                      ItemsSource="{x:Bind m_Client.Contacts}">
        <ListView.ItemTemplate>
            <DataTemplate x:DataType="data:Contact">
                <StackPanel Orientation="Horizontal">
                    <TextBlock Text="{x:Bind Username}" VerticalAlignment="Center" />
                    // HERE SHOULD BE THE <Image> THAT SHOULD BE BOUND TO THE Msg PROPERTY
                </StackPanel>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>

What I need to accomplish is that when the Msg boolean is true, the image source to be one image, and when the Msg boolean is false the image source to change to the second image.

EDIT: I created this class:

namespace ContactsListBinding.Models
{
    public class MyImageConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, string language)
        {
            return (bool)value ? new BitmapImage(new Uri("ms-appx:///Assets/true.png")) : new BitmapImage(new Uri("ms-appx:///Assets/false.png"));
        }

        public object ConvertBack(object value, Type targetType, object parameter, string language)
        {
            throw new NotImplementedException();
        }
    }
}

This is the XAML:

<Page
    x:Class="ContactsListBinding.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:ContactsListBinding"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    xmlns:data="using:ContactsListBinding.Models"
    xmlns:namespace="ContactsListBinding.Models">

    <Page.Resources>
        <data:MyImageConverter x:Key="MyImageConverter" />
    </Page.Resources>

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <Button Grid.Row="0" Grid.Column="0" Name="AddContactButton" Content="Add Contact" Click="AddContactButton_Click" />
        <ListView Grid.Row="1" Grid.Column="0" Name="ContactsListView" 
                          IsItemClickEnabled="True" 
                          ItemsSource="{x:Bind m_Client.Contacts}">
            <ListView.ItemTemplate>
                <DataTemplate x:DataType="data:Contact">
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Text="{x:Bind Username}" VerticalAlignment="Center" />
                        <Image Source="{x:Bind Msg, Converter={StaticResources MyImageConverter}}" />
                    </StackPanel>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
    </Grid>
</Page>

What am I doing wrong here?