access denied

[Bill Gilmore <caddmasters home com>]

I am trying to copy some files from an NT 4.0 workstation to a vfat partition on my Linux server.  I have put the following into my local.rc file:

mount -t vfat /dev/hdc1 /mnt/cm_7

in my smb.conf file I have:

# Share CM_7
[cm_7]
    comment = CM_7 share
    path = /mnt/cm_7
    valid users = blah1 blah2
    public = no
    writable = yes
    printable = no
 
I can use Mr. Network's Neighborhood on the NT 4.0 workstation to map this share as drive L:, but when I try to copy files to L: i get "access denied".

What am I doing wrong this time?
TIA,
Bill