[Samba] Cannot see linux machines from XP

[Al Schapira]

I'll try to spell out the problem as best I can.

There are three computers on a LAN,  "ADS1", "ADS2" and "DRS2".
ADS1 and ADS2 run samba-3.5.8-76.fc14.i686 under Fedora 14.
DRS2 runs Windows XP professional, SP3.

Each of them can successfully ping all the others by name.
They are all in the same WORKGROUP (GAMMA5).

The Fedora machines (ADS1, ADS2) can see all three machines (including
the XP machine) in their Network places, and in the Windows Network,
and can successfully read and write designated shared files on the all
the other machines (including the XP machine).

The Windows machine (DRS2) cannot even see the linux machines in its
network places. (It sees only itself, DRS2 in the WORKGROUP GAMMA5)
Naturally, therefore, it cannot see files on the linux machines.

Where do I start to solve this?

Thanks in advance for you help.

	-Al

Here is the non-comment part of smb.conf on ADS2
================================================
[global]
	workgroup = gamma5
	security = share
	idmap uid = 16777216-33554431
	idmap gid = 16777216-33554431
	winbind use default domain = false
	winbind offline logon = false

	server string = Samba Server Version %v

	netbios name = ADS2

	log file = /var/log/samba/log.%m
	max log size = 50

	cups options = raw

	encrypt passwords = no
	guest ok = yes
	guest account = guest

[homes]
	comment = Home Directories
	browseable = no
	writable = yes

[printers]
	comment = All Printers
	path = /var/spool/samba
	browseable = no
	printable = yes

[other]
	path = /other
	read only = no
	guest ok = yes

... other shares, nothing else.