After smbclient -L 172.16.50.110
read_socket_with_timeout: timeout read. read error = Connection reset by peer.
Receiving SMB: Server stopped responding
protocol negotiation failed

And after all actions connecting to smb.

[2009/09/16 18:00:40,  0] smbd/server.c:main(1274)
  smbd version 3.3.7 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2009
[2009/09/16 18:01:09,  0] lib/fault.c:fault_report(40)
  ===============================================================
[2009/09/16 18:01:09,  0] lib/fault.c:fault_report(41)
  INTERNAL ERROR: Signal 11 in pid 22059 (3.3.7)
  Please read the Trouble-Shooting section of the Samba3-HOWTO
[2009/09/16 18:01:09,  0] lib/fault.c:fault_report(43)

  From: http://www.samba.org/samba/docs/Samba3-HOWTO.pdf
[2009/09/16 18:01:09,  0] lib/fault.c:fault_report(44)
  ===============================================================
[2009/09/16 18:01:09,  0] lib/util.c:smb_panic(1673)
  PANIC (pid 22059): internal error
[2009/09/16 18:01:09,  0] lib/util.c:log_stack_trace(1777)
  BACKTRACE: 8 stack frames:
   #0 /usr/sbin/smbd(log_stack_trace+0x1c) [0x7fa5fc759d17]
   #1 /usr/sbin/smbd(smb_panic+0x5b) [0x7fa5fc759e24]
   #2 /usr/sbin/smbd [0x7fa5fc747041]
   #3 /lib/libpthread.so.0 [0x7fa5fa7f2ee0]
   #4 /usr/sbin/smbd(dns_register_smbd_reply+0x1c) [0x7fa5fc5bba2b]
   #5 /usr/sbin/smbd(main+0x16de) [0x7fa5fc94e5d2]
   #6 /lib/libc.so.6(__libc_start_main+0xe6) [0x7fa5f8f94a26]
   #7 /usr/sbin/smbd [0x7fa5fc542c19]
[2009/09/16 18:01:09,  0] lib/fault.c:dump_core(231)
  dumping core in /var/log/samba/cores/smbd