samba - May 2009 - Unable to find tun interface

Hi all.

I'm trying to set up Samba on a dedicated server. I want Samba to listen
on a openvpn tun interface but log.nmbd says:
[2009/05/07 12:35:43,  0] lib/interface.c:load_interfaces(543)
  WARNING: no network interfaces found

even though there is one:

tun0      Link encap:UNSPEC  HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:10.8.0.1  P-t-P:10.8.0.2  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:9 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:540 (540.0 B)  TX bytes:708 (708.0 B)

In the smb.conf I have:
interfaces  = 10.8.0.0/24


Can anyone help me please? :D