[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