fixed
1) sudo gedit /etc/nsswitch.conf
2) Look for this line: hosts: files mdns4_minimal [NOTFOUND=return] dns
mdns4
3) Add "wins" so it looks like this: hosts: files mdns4_minimal [NOTFOUND=
return] wins dns mdns4
4) Install the "winbind" package: sudo apt-get install winbind (or via
software center or synaptic)
5) Reboot or restart your network