function _connect($argHostname, $argUsername, $argPassword, $argDatabasename,$newconnect=false)
	{
		if (!function_exists('mssql_pconnect')) return null;
		$this->_connectionID = mssql_connect($argHostname,$argUsername,$argPassword,$newconnect);
		if ($this->_connectionID === false) return false;
		if ($argDatabasename) return $this->SelectDB($argDatabasename);
		return true;
	}