[Samba] help: samba server don't work, log says: PANIC: failed to set gid

[=?gb2312?q?Ling=20Johnny?=]

hi all,
 
when i try to connnect to my smaba server from a win2000 workstation, it says the using network name is no longer usable.
 
the log is like below:
...
 
[1970/01/01 00:00:39, 10] ../lib/util.c:dump_data(1541)
  [000] 4D 5C E0 48 6D A0 99 2B  CC 9F 15 9C AF E6 74 3B  M\.Hm..+ ......t;
[1970/01/01 00:00:39, 10] ../lib/util.c:dump_data(1549)
  [010] CB 61 96 1F 8B ED DD 3B  5C 5C 31 37 32 2E 39 36  .a.....; \\172.96
[1970/01/01 00:00:39, 10] ../lib/util.c:dump_data(1549)
  [020] 2E 33 33 2E 31 34 37 5C  49 50 43 24 00 3F 3F 3F  .33.147\ IPC$.???
[1970/01/01 00:00:39, 10] ../lib/util.c:dump_data(1549)
  [030] 3F 3F 00                                          ??. 
[1970/01/01 00:00:39, 3] ../smbd/process.c:switch_message(685)
  switch message SMBtconX (pid 97)
[1970/01/01 00:00:39, 3] ../smbd/sec_ctx.c:set_sec_ctx(329)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0
[1970/01/01 00:00:39, 5] ../smbd/uid.c:change_to_root_user(217)
  change_to_root_user: now uid=(0,0) gid=(0,0)
[1970/01/01 00:00:39, 4] ../smbd/reply.c:reply_tcon_and_X(334)
  Got device type ?????
[1970/01/01 00:00:39, 10] ../lib/access.c:check_access(304)
  check_access: allow = , deny = 
[1970/01/01 00:00:39, 10] ../lib/username.c:user_in_list(456)
  user_in_list: checking user  in list 
[1970/01/01 00:00:39, 3] ../smbd/password.c:authorise_login(855)
  authorise_login: ACCEPTED: guest account and guest ok (nobody)
[1970/01/01 00:00:39, 10] ../lib/username.c:user_in_list(456)
  user_in_list: checking user nobody in list 
[1970/01/01 00:00:39, 10] ../smbd/service.c:make_connection(356)
  make_connection: share is set read only.
[1970/01/01 00:00:39, 10] ../lib/username.c:user_in_list(456)
  user_in_list: checking user nobody in list 
[1970/01/01 00:00:39, 10] ../lib/username.c:user_in_list(456)
  user_in_list: checking user nobody in list 
[1970/01/01 00:00:39, 10] ../lib/username.c:user_in_list(456)
  user_in_list: checking user nobody in list 
[1970/01/01 00:00:39, 3] ../smbd/service.c:make_connection(487)
  Connect path is /tmp
[1970/01/01 00:00:39, 3] ../smbd/sec_ctx.c:push_sec_ctx(297)
  push_sec_ctx(0, 0) : sec_ctx_stack_ndx = 1
[1970/01/01 00:00:39, 3] ../smbd/uid.c:push_conn_ctx(286)
  push_conn_ctx(0) : conn_ctx_stack_ndx = 0
[1970/01/01 00:00:39, 3] ../smbd/sec_ctx.c:set_sec_ctx(329)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 1
[1970/01/01 00:00:39, 0] ../lib/util_sec.c:assert_gid(114)
  Failed to set gid privileges to (-1,65534) now set to (0,0) uid=(0,0)
[1970/01/01 00:00:39, 0] ../lib/util.c:smb_panic(1094)
  PANIC: failed to set gid

can anybody help me?
the version of my samba server is 2.2.8.

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