[Samba] Network Neighborhood can see Samba server, but cannot access!

[#ENG YI HAN#]

I got an error by clicking on the Samba server in the Network Neighborhood:
 
ERROR:
\\SMBSERVER is not accessible, the computer or sharename could not be found, make sure you typed it correctly, and try again.
 
This is my smb.conf:
[global]
   workgroup = WORKGROUPNAME
   security = share
 
[tmp]
   path = /tmp
 
-I can access other servers within WORKGROUPNAME, but they can only see me, can't gain access to my resource. 
 
-When I issue this sommand: smbclient -L //SMBSERVER, in the server column, only SMBSERVER is shown, all other computers within the workgroup r missing, but I can access them by smbclient -L //ANYSERVER
 
-I'm using Samba 2.2.3a + Debian GNU/Linux 2.2r5.
 
Please help, thanks a lot.