[Samba] Strange behaviour on Win98

["Marc Schütz (PPS)"]

I am currently trying to integrate a Samba v2.2.5 server into an NT domain.

I have already succeeded to join the server into the domain and have 
authentication working (security = DOMAIN), but when I'm trying to 
access it from a Win98 client, it sometimes says "network name not 
found", although the server is visible in the "network neighbourhood".

Then, after waiting a few minutes/seconds, I suddenly can access it 
again, but other clients still can't find the server.

The domain controller however doesn't seem to have this problem.

All of our workstations as well as the server use IP and IPX protocols; 
could that be the problem?

Does anybody have any suggestions/solutions to this problem?

(Attached is my smb.conf)

Thanks in advance,
Marc Schütz PPS

PS: please CC me, I'm not on the list...
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# Samba config file created using SWAT
# from 192.168.1.152 (192.168.1.152)
# Date: 2003/02/14 09:27:47

# Global parameters
[global]
	workgroup = TSK
	server string = Samba Fileserver TSK
	security = DOMAIN
	encrypt passwords = Yes
	password server = *
	username map = /etc/samba/smbusers
	time server = Yes
	unix extensions = Yes
	socket options = SO_KEEPALIVE IPTOS_LOWDELAY TCP_NODELAY
	printcap name = CUPS
	character set = ISO8859-15
	add user script = /root/bin/samba-add-user.sh %u
#	os level = 33
	printing = cups
	veto files = /*.eml/*.nws/riched20.dll/*.{*}/

[%U]
	comment = Home Directory
	read only = No
	create mask = 0640
	directory mask = 0750
	path = %H

[printers]
	comment = All Printers
	path = /var/tmp
	create mask = 0600
	printable = Yes
	browseable = No

[print$]
	comment = Printer Drivers
	path = /var/lib/samba/drivers
	write list = @ntadmin root
	force group = ntadmin
	create mask = 0664
	directory mask = 0775

[groups]
	path = /smbgroups
	read only = No