[Samba] Sometimes unable to browse w2k shares

[rmi]

Lo folks,

Plz i need some advice, im totally clueless at the moment where to look and what to do.
I have one samba 3.0.1 PDC and ten win 9x clients and two XP pro clients and one w2k print server with some shares.

It all worked good until i joined the w2k server into the domain. The first couple of hours after joining all shares and all printer were available on the win2k server. But then all of a sudden i couldnt see any shares from the w2k server on the netwerk.When i try to browse the w2k server shares via 9x clients i get a unknown error 31.
Even the ./smbclient -L //w2k/share -U aap doesnt let me see shares.

Sometimes after an hour orso the shares are again available, or else i have to stop and start samba.
What could be wrong, Does any1 have any suggestions?

Thx in advance

rmi

===============================
smb.conf
==============================
[global]
	workgroup = GENERAL
	netbios aliases = C001
	server string = Samba Server
	password server = 
	passdb backend = tdbsam
	username map = /usr/local/samba/lib/username.map
	log level = 5
	log file = /var/log/samba/log.%m
	max log size = 50
	socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
	load printers = No
	show add printer wizard = No
	add machine script = /usr/sbin/useradd -s /bin/false -d /dev/null %u
	logon path = 
	domain logons = Yes
	os level = 40
	preferred master = Yes
	domain master = Yes
	dns proxy = No
	ldap ssl = no
	template homedir = /opt/oc/home/%D/%U

[homes]
	comment = Home Directories
	read only = No
	veto files = /.??*/
	browseable = No

[printers]
	comment = All Printers
	path = /var/spool/samba
	printable = Yes
	browseable = No

[oc_data]
	comment = OCH Data
	path = /opt/oc/oc_data
	valid users = @oc_med
	admin users = @symas
	read list = @oc_med
	write list = @oc_med
	read only = No
	create mask = 0770
	security mask = 0770
	directory mask = 0770
	directory security mask = 0770
	veto files = /lost+found/
	hide files = /lost+found/

[netlogon]
	path = /opt/oc/netlogon
	guest ok = Yes