[flexcoders] how can I read an xml with remoteObject

[lyan_wang2003]

up to now I know how to use httpservice to get xml data,but I don't how
to edit an xml.So I change to use remoteObject and Coldfusion,because 
coldfusion can edit an xml file using <cffile> file.
It seems I can get xml data from it cause I can see the infor in the 
debug window,the whole xml structure.I suppose the event.result is an 
XML object.But when I cast it to an arrayCollection,error appears.I 
just don't know why!!!!