[Samba] NT_STATUS_ACCESS_DENIED

[Chris du Preez]

Hi I have a small problem I get a message NT_STATUS_ACCESS_DENIED if I want to 
do a listing after I have logged in a samba server.
I do it like this
# smbclient //bbb/chr -U chr
Password:
Domain=[BBB] OS=[Unix] Server=[Samba 3.0.28-0.fc8]
smb: \> ls
NT_STATUS_ACCESS_DENIED listing \*

                51148 blocks of size 4194304. 27065 blocks available

Any help will be appreciated
Thanks in advance
Chris

This is what my smb.conf look like

[global]
        workgroup = FLAMENGRO
        realm = NONE
        server string = BBB Samba Server
        password server =
        username map = /etc/samba/smbusers
        log file = /var/log/samba/%m.log
        max log size = 50
        printcap name = /etc/printcap
        preferred master = No
        local master = No
        domain master = No
        dns proxy = No
        ldap ssl = no
        cups options = raw

[homes]
        comment = Home Directories
        valid users = chr
        read only = No
        browseable = No

[printers]
        comment = All Printers
        path = /var/spool/samba/
        printable = Yes
        browseable = No