samba - Dec 1998 - Invalid snum errors

I've found these errors in my log.smbd file:

Invalid snum 17 for admin
1998/12/03 10:35:48 xxxxxx (xx.xx.xx.xx) couldn't find service admin

This occurs when attempting to connect to a share from a Win95 system.

This is the share definition from smb.conf:

[admin]
        available = no
        browsable = no
        path=/usr/SHERNET.32/groups/admin
        read only = yes
        write list = pc
        fake oplocks = yes
        oplocks = no
        locking = no
        share modes = no

There are quite a few other shares on the server that are configured
exactly the same as this one, and those are accessible.  Any would
be helpfull.

Thanks.

Rob Naccarato           "Civilized men are more discourteous than savages
Sys Admin               because they know they can be impolite without
Sheridan College        having their skulls split, as a general thing."
Oakville, Ont. Canada                      - Robert E. Howard