problem with XMLParser

I've been looking around the forums th last few days for an XMLParser. Now I've found one in this forum thread: http://forum.unity3d.com/threads/25352-Loading-an-XML-file there is an XMLParser posted by HiggyB. My problem is that when i try to use it in Unity I get this error:

Assets/Scripts/XML/XMLParser.js(59,45): BCE0022: Cannot convert 'System.Array' to 'System.Collection.Hashtable[]'.

in this line of code

return tSystemData.ToBuiltin(Hashtable);

the orignial code can be found here: http://forum.unity3d.com/attachment.php?attachmentid=6050&d=1245797838