Trying to understand why event listener does not close down

Geolocation Method (Titanium)

	Ti.Geolocation.getCurrentPosition(function(e)
	{
		if (!e.success || e.error)
		{
			Ti.API.debug('error ' + JSON.stringify(e.error));
			return;
		} 
		Ti.Geolocation.addEventListener('location',function(e)
		{
			if (!e.success || e.error)
			{
				return;
			}
			function IsNumeric(input)
			{
			   return (input - 0) == input && input.length > 0;
			}
			MyClass.latitude = e.coords.latitude;
			MyClass.longitude = e.coords.longitude;
			MyClass.latlong = e.coords.latitude + ',' + e.coords.longitude;
			MyClass.accuracy = e.coords.accuracy;
			MyClass.timestamp = e.coords.timestamp;
			Ti.API.info(e.type + ' handler (' + e.source + ') Accuracy: ' + MyClass.accuracy);
			setTimeout(function(e)
			{
			MyClass.processGeoData(MyClass.latitude,MyClass.longitude);
			Ti.API.log('Last location: ' + 
			new Date(MyClass.timestamp) + 
			' long ' + 
			MyClass.longitude + 
			' lat ' + 
			MyClass.latitude + 
			' accuracy ' + 
			MyClass.accuracy);				
				}, 2000);
		});
	});