[Samba] share persistence problem

[Paul Trepanier]

After awhile, my connections from my PC to my samba server end up with a 
red "X" in them (share disappeared) if I leave my explorer window open. 
     If I click on these, they "wake up" and continue to function (and 
the red X's go away).  If I close my explorer window (while the red X's 
are there) and reopen it , they are gone.  An attempt to reestablish 
these  dropped connections is immediately successful.

This is obviously a connection persistence issue and I've tried setting 
both keepalive= and SO_KEEPALIVE (individually, of course) to no avail.

Any ideas?

My installation is samba 2.2.8 running as a daemon (not inetd) on
Solaris 8 configured to use a WINS server and provide authentication via
a PDC (same host as WINS server).  I do have an lmhosts file in the
samba /lib directory with the PDC/WINS server address in it.
My globals section;

[global]
        workgroup = WORKGROUP
        netbios name = SAMBASERVER
        security = SERVER
        encrypt passwords = Yes
        password server = pdc
        lanman auth = No
        log level = 2
        log file = /usr/local/depot/samba-2.2.8/var/%m.log
        deadtime = 5
        max smbd processes = 5
        socket options = IPTOS_LOWDELAY TCP_NODELAY SO_KEEPALIVE
        load printers = No
        show add printer wizard = No
        preferred master = No
        local master = No
        domain master = No
        wins server = [IP address of WINS/PDC server]
        follow symlinks = No
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