MVS 2005 w/Outlook Reference -- Get UserProperty/UserProperties from

I have a custom task form in which I would like to access the 
UserProperties via code (VB) and am trying the following:

Debug.Print (c.UserProperties("AWM"))

Where c=an Outlook task item and "AWM" is a custom field on the form. 
However, it errors out.  This method works fine within MS Access.  How 
do I do this via MVS?  Thanks for any help.