I am having a problem binding a log file to a WPF list control.
My list is ObservableCollection<string>

My data changes through an even under the hood. My list should change in the window. I do not see changes. As my hardware issues events the data is updating the log file but the view is not updating.

[Serializable]
public class MeterLog : NotificationObject
{
private static MeterLog instance;
public static MeterLog Instance
{
get
{
if(instance == null)
instance = new MeterLog();
return instance;
}
}

private MeterLog()
{
Title = "Debug Log\n";
Add(string.Format("Log Timesttamp:{0}", DateTime.Now.ToShortTimeString()));
}

public string Title { get; set; }
private ObservableCollection<string> log = new ObservableCollection<string>();

public ObservableCollection<string> Log
{
get { return log; }
private set { log = value; this.RaisePropertyChanged("Log"); }
}

public void Add(string msg)
{
log.Add(msg);
}

public void WriteXMLFile()
{
MeterLog log = MeterLog.instance;

System.Xml.Serialization.XmlSerializer writer =
new System.Xml.Serialization.XmlSerializer(typeof(MeterLog));

log.Title = "This is the Allication Error Log";

System.IO.StreamWriter file = new System.IO.StreamWriter(
AppDomain.CurrentDomain.BaseDirectory +"\\ApplicationLog.xml");

writer.Serialize(file, log);
file.Close();
}
}


VIEW MODEL
public ObservableCollection<string> ErrorLog
{
get
{
return myHardware.Log;
}
}

My XAML is here

<Window.DataContext>
<vm:ViewModelOne />
</Window.DataContext>

<ListBox Margin="10,10,10,375" x:Name="lvErrors" ItemsSource="{Binding ErrorLog}" HorizontalAlignment="Stretch" Grid.Row="2" />