Samba share unreachable on OS X 10.8.2
I am only guessing here, as my G4 quicksilver can't run OS X 10.8, but the confil file may require SMB signing and NTLM v2, try lowering the authentication level, and turning off SMB signing and let me know if that resolves your issue. In previous versions it was smb.conf

You may want to also try:
http://eduo.info/apps/smbup

http://jsddevelopment.blogspot.com.es/2012/06/wdtv-live-and-samba.html