samba - Apr 2003 - Default user profiles

I currently have a default user profile stored in:

/export/profiles/Default User/

The relevant smb.conf sections are:
logon path = \\%L\profiles\%U

[profiles]
        browsable = no
        public = yes
        path = /export/profiles
        writeable = yes
        csc policy = disable

However, when a user has no profile of their own, it does not pick up this
default profile.

Thanks,

Chris.