OS X Server not showing in Windows Vista Shared

I have OS X Server installed. I am using Window Vista on a PC. But on my network I can't see the OS X server. But I can see other Mac computers in shared but not OS X server.

I am able to ping the IP.

What should I do?

From serverfault Master

• On the OS X server you should disable the builtin Firewall (if you have it enabled) and enable the Windows file sharing service in Server Admin.

  Master : There is no problem with OSX as all other computer on netwrok can see it

  Master : even ubutntu can see the server but not windows vista
  From Josh Budde