Comment 5 for bug 112839

As TEN pointed out in IRC, it seems like you need to add a servernetbiosname=SMBSERV option, assuming that your server is called "smbserv". This is the NETBIOS name, so it needs to be in all caps. (This only applies if you want to connect to all this old stuff, like OS/2 or Win3.11, possibly up to Win98, haven't tried that, Win NT4 and newer should be fine)