Connecting Windows Box to a Samba Share

I have Unix box that has two Samba shares. One uses the default port 139 and one is configured for port 140. In Windows I can map a drive and connect to the port 139 one with \\hostname\sharename. I tried to connect to port 140 with \\hostname:port#\sharename and that didn’t work. Anybody know of a way for Windows 2000 and XP to see the port 140 one? Thanks for your help.