protected function _headers()
	{
		if ($_SERVER['REQUEST_METHOD'] == 'POST')
		{
			header('Content-Type: text/xml');
		}
		else if (isset($_GET['wsdl']) or isset($_GET['WSDL']))
		{
			header('Content-Type: text/xml');
		}
		else
		{
			header('Content-Type: text/plain');
		}
		
		return true;
	}