Why can't map driver?

[SevenZhao_1]

Dear, Experts:
A problem with mapped driver. My L-class server run 11.0, export /user (contain 4 sub - directory user1, user2 , user3 , user4) . 4 PC run win2K, and F:\ driver map to /user/user1. After a couple days , a red cross appeared at F:\ driver's icon . I double clicked the icon, can open F:\ driver and saw the sub-directory. When I restart the PC , a dialog said ,"An error occurred , the remote computer is not available", and so on, only "OK" can click. ,F:\ driver can't mapped .
So, which configuration file should I check or what program can be used to find the root cause.
Tks a lot.

[AndyShi]

Check your server, the file is /opt/samba/lib/samba.cfg, the workgroup is same with your Pc or not!

[Donald Kok]

On the UX
- is samba working? ps -ef | grep mbd (there should be 1 nmbd proces, and maybe several smbd's)
- check the smb.conf

On an wintel dosbox:
- ping the UX machine (is communication possible)
- net view \\ux-machine (is samba working, are the share's visible)