samba - ztraceny server

[Mošnička Roman]

Dobry den,
obcas se mi stava, ze z nejakych win stanic prestanu videt server, kde mi bezi samba. Nepomuze restart samby, nepomuze restart
win. pc ze ktereho se na server pripojuji - proste se to necha par dni ulezet a najednou to zase jde.
Nemel by nekdo tip, na co bych se mohl zamerit ?

Na serveru je 
Debian GNU/\s 2.2 \n \l
samba          2.0.7-3

[global]
        security = server
        wins server = 192.168.1.1
        workgroup = debian
        password server = LEONA
        log file = /var/log/samba-log.%m
        encrypt passwords = yes
        share modes = yes
        netbios name = LNX638A
        wins support = false
        username map = /etc/user.map
        lock directory = /var/lock/samba
        socket options = TCP_NODELAY


[backup]
        revalidate = yes
        create mode = 0750
        valid users = progress, root
        writable = no
        comment = LNX638A backup volume
        path = /backup/

Predem dekuji za pripadnou radu
Roman Mosnicka