[Samba] Force user doesn't work

[Bart-Jan van Hummel]

I am using Samba 3.6.6 on Debian Wheezy. 

I want to be able to change www files on my dev server using my macbook. 
So I setup samba and made a share for the /var/www directory. 

I added the users bart & root to samba to connect. And connect using command K and then smb://192.168.2.100 (my samba server). 

As apache uses www-data as a user and group for the www files I use force user and force group in samba to prevent errors in the rights. 

However it does force the group www-data, but doesn't force the user. Every file I create is being owned by root in the group www-data. 


To seek for errors I tailed the logs in /var/log/samba and only found an error in the log.smbd when restarting the samba service. See the log here: 

smbd version 3.6.6 started. 
Copyright Andrew Tridgell and the Samba Team 1992-2011 
[2013/09/23 11:14:22.601031, 0] printing/print_cups.c:110(cups_connect) 
Unable to connect to CUPS server localhost:631 - Connection refused 
[2013/09/23 11:14:22.602215, 0] printing/print_cups.c:487(cups_async_callback) 
failed to retrieve printer list: NT_STATUS_UNSUCCESSFUL 


And here is my smb.conf: 

[global] 
server string = %h server 
map to guest = Bad User 
obey pam restrictions = Yes 
pam password change = Yes 
passwd program = /usr/bin/passwd %u 
passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . 
unix password sync = Yes 
syslog = 0 
log file = /var/log/samba/log.%m 
max log size = 1000 
dns proxy = No 
usershare allow guests = Yes 
panic action = /usr/share/samba/panic-action %d 
idmap config * : backend = tdb 

[homes] 
comment = Home Directories 
valid users = %S 
create mask = 0700 
directory mask = 0700 
browseable = No 

[printers] 
comment = All Printers 
path = /var/spool/samba 
create mask = 0700 
printable = Yes 
print ok = Yes 
browseable = No 

[print$] 
comment = Printer Drivers 
path = /var/lib/samba/printers 

[www] 
comment = www 
path = /var/www/ 
valid users = bart, root 
admin users = bart, root 
write list = bart, root 
force user = www-data 
force group = www-data 
read only = No 


I even tried adding www-data to the valid users as well as the admin users and the write list. This did not have any effect. 

Can you help me out? Thanks in advance!