Media Element wont play

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C#

WPF

Hi.
I'm trying to create a media element from code on a button press.
Ive created a xaml media element which works fine but when i try to create a media element from c# code it will not work.

Here is my Xaml.

mediaelement name="meXAML" loadedbehavior="Manual"




And the code behind

public partial class MainWindow : Window
    {
        MediaElement meC;
        public MainWindow()
        {
            InitializeComponent();
        }

        private void btnCode_Click(object sender, RoutedEventArgs e)
        {
            meC = new MediaElement();
            meC.LoadedBehavior = MediaState.Manual;
            meC.Source = new Uri("C:/Music/10cc/10cc - Rubber Bullets.mp3", UriKind.Relative);
            meC.Play();
        }
        private void btnXaml_Click(object sender, RoutedEventArgs e)
        {
            meXAML.Source = new Uri("C:/Music/10cc/10cc - Rubber Bullets.mp3", UriKind.Relative);
            meXAML.Play();
        }
        
    }

As far as I can see both media elements are set the same only using different methods.

The XAML media element plays fine but the code generated one will not.

Any help will be greatly appreciated.