Here is my xml file called AvailableTestsXMLFile2.xml.  I have added this file to my project.
Here is my xaml (I am not getting anything in my combobox called testNameBox)...
 
        
<Window x:Class="WpfTester.MainWindow"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:WpfTester"
         mc:Ignorable="d"
         Title="MainWindow" Height="450" Width="800">
     <Window.Resources>
         <XmlDataProvider x:Key="AvailableTests" Source="AvailableTestsXMLFile2.xml" XPath="AvailableTests"/>
     </Window.Resources>
      <StackPanel Orientation="Vertical" MaxWidth="500" HorizontalAlignment="Left">
         <Grid>
             <Image HorizontalAlignment="Left" VerticalAlignment="Top" Source="C:\Users\StarkS02\Pictures\abbott-logo.jpg" Height="72" Width="72"/>
         </Grid>
          <Border Background="DeepSkyBlue" BorderThickness="2" BorderBrush="Black" CornerRadius="10" Margin="10" Width="450" Height="85">
             <StackPanel>
                 <TextBlock>Configuration Section</TextBlock>
             </StackPanel>
             
         </Border>
         <Border Background="DeepSkyBlue" BorderThickness="2" BorderBrush="Black" CornerRadius="10"  Margin="10">
             <StackPanel>
                 <TextBlock>Select Test</TextBlock>
                 <StackPanel Orientation="Horizontal">
                     <ComboBox x:Name="testNameBox"   IsReadOnly="True" HorizontalAlignment="Left" IsEditable="False" ItemsSource="{Binding Source={StaticResource AvailableTests}, XPath=./AvailableTests/Test/name}" Margin="10 10 10 10" DisplayMemberPath="Test/name*" Text="name" DataContext="name">
                     </ComboBox>
                     <ComboBox x:Name="testSelectedBox" IsReadOnly="False" HorizontalAlignment="right" IsEditable="False" Margin="10 10 10 10">
                     </ComboBox>
                 </StackPanel>
                 <CheckBox Name="ChkRepeatTilFailure" Foreground="White" Content="Repeat Test Until Failure" Margin="5 5 5 5"/>
                 <StackPanel Orientation="Horizontal">
                     <Image HorizontalAlignment="Left" VerticalAlignment="Top" Source="C:\Users\StarkS02\Pictures\play.png" Height="42" Width="42"/>
                     <Image HorizontalAlignment="Left" VerticalAlignment="Top" Source="C:\Users\StarkS02\Pictures\pause.jpg" Height="42" Width="42"/>
                     <Image HorizontalAlignment="Left" VerticalAlignment="Top" Source="C:\Users\StarkS02\Pictures\stop.png" Height="42" Width="42"/>
                  </StackPanel>
                 <Button Content="Submit Test" Margin="4 4 4 4" Width="65"/>
              </StackPanel>
          </Border>
         <Border Background="DeepSkyBlue" BorderThickness="2" BorderBrush="Black" CornerRadius="10" Margin="10" Height="65">
              <StackPanel>
                 <TextBlock>Test Response Section</TextBlock>
                 <TextBox Text="Test 3 Successful!" />
             </StackPanel>
         </Border>
     </StackPanel>
 </Window>