>ADD UCMUG-L Angela Madeupname [log in to unmask]
>"McCarthy [log in to unmask]" <[log in to unmask]> has been
>added   to  the   UCMUG-L   list.  Notification   has   been  sent   to
>[log in to unmask]

Your syntax is backwards.  The correct syntax is

ADD UCMUG-L [log in to unmask] Angela Madeupname

Nathan