|Thank you very much for your responses, wanderer|
This ends up a very interesting steps to make it work.
As I said, I had turned on NetBIOS on TCP/IP on the adapter, however, it stays disabled.
It turns out, I had to turn on "NetBIOS on TCP/IP" on the virtual network, not the original network with adapter. ( This server has only one LAN card.)
After that, I had to reboot to see everything although system did not ask to reboot.
(Without reboot, server won't see shares of xp nodes although xp nodes can see server shares and nbtstat and ipconfig show the right info.)
I probably should test why the first network won't work. (They are on the same subnet.)
Thank you very much again, wanderer