There is not enough code to determine the problem. But here is an example that works for me

o=CREATEOBJECT('outlook.application')
ns = o.GetNamespace('mapi')
df = ns.getdefaultfolder(6)
FOR EACH oItem IN df.items
 ? oItem.subject
ENDFOR

>This is the GETSUBJECT method of the OUTLOOKMAIL class.
>
>
>lcSubject=THIS.oInbox.Items[THIS.nCurrentMessageNumber].Subject