Ошибки в XML карте - Xmap

<b>Warning</b>:  implode() [<a href='function.implode'>function.implode</a>]: Invalid arguments passed in <b>/data/www/afkcom.com/plugins/xmap/com_k2/com_k2.php</b> on line <b>191</b><br />

case "categories":
if (!self::$suppressSub)
	{
		$query = $baseQuery."catid in (".implode(",", $ids).") order by 1 DESC ";
		$db->setQuery($query);
		$rows = $db->loadObjectList ();
	}