samba - Jan 2013 - Samba is slow and crash when i transfert one file

Hi at All

Samba stop my transfert when i want to copie one files or is very low.
I don't for why

in my log, i have when my copie crash :

[2013/01/10 21:40:56.442652,  3] smbd/oplock.c:895(init_oplocks)
  init_oplocks: initializing messages.
[2013/01/10 21:40:56.442712,  3]
smbd/oplock_linux.c:224(linux_init_kernel_oplocks)
  Linux kernel oplocks enabled
[2013/01/10 21:40:56.445978,  3] smbd/process.c:1485(process_smb)
  Transaction 0 of length 137 (0 toread)
[2013/01/10 21:40:56.446004,  3] smbd/process.c:1294(switch_message)
  switch message SMBnegprot (pid 29106) conn 0x0
[2013/01/10 21:40:56.446017,  3] smbd/sec_ctx.c:310(set_sec_ctx)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0
[2013/01/10 21:40:56.446054,  3] smbd/negprot.c:587(reply_negprot)
  Requested protocol [PC NETWORK PROGRAM 1.0]
[2013/01/10 21:40:56.446066,  3] smbd/negprot.c:587(reply_negprot)
  Requested protocol [LANMAN1.0]
[2013/01/10 21:40:56.446075,  3] smbd/negprot.c:587(reply_negprot)
  Requested protocol [Windows for Workgroups 3.1a]
[2013/01/10 21:40:56.446083,  3] smbd/negprot.c:587(reply_negprot)
  Requested protocol [LM1.2X002]
[2013/01/10 21:40:56.446091,  3] smbd/negprot.c:587(reply_negprot)
  Requested protocol [LANMAN2.1]
[2013/01/10 21:40:56.446098,  3] smbd/negprot.c:587(reply_negprot)
  Requested protocol [NT LM 0.12]
[2013/01/10 21:40:56.446174,  3] smbd/negprot.c:405(reply_nt1)
  using SPNEGO
[2013/01/10 21:40:56.446190,  3] smbd/negprot.c:692(reply_negprot)
  Selected protocol NT LM 0.12
[2013/01/10 21:40:56.590285,  3] smbd/process.c:1485(process_smb)
  Transaction 1 of length 142 (0 toread)
[2013/01/10 21:40:56.590309,  3] smbd/process.c:1294(switch_message)
  switch message SMBsesssetupX (pid 29106) conn 0x0
[2013/01/10 21:40:56.590319,  3] smbd/sec_ctx.c:310(set_sec_ctx)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0
[2013/01/10 21:40:56.590332,  3]
smbd/sesssetup.c:1436(reply_sesssetup_and_X)
  wct=12 flg2=0xc807
[2013/01/10 21:40:56.590345,  2] smbd/sesssetup.c:1391(setup_new_vc_session)
  setup_new_vc_session: New VC == 0, if NT4.x compatible we would close all
old resources.
[2013/01/10 21:40:56.590355,  3]
smbd/sesssetup.c:1190(reply_sesssetup_and_X_spnego)
  Doing spnego session setup
[2013/01/10 21:40:56.590366,  3]
smbd/sesssetup.c:1232(reply_sesssetup_and_X_spnego)
  NativeOS=[] NativeLanMan=[] PrimaryDomain=[]
[2013/01/10 21:40:56.590390,  3]
smbd/sesssetup.c:806(reply_spnego_negotiate)
  reply_spnego_negotiate: Got secblob of size 40
[2013/01/10 21:40:56.590429,  3] libsmb/ntlmssp.c:65(debug_ntlmssp_flags)
  Got NTLMSSP neg_flags=0xe2088297
[2013/01/10 21:40:56.612941,  3] smbd/process.c:1485(process_smb)
  Transaction 2 of length 426 (0 toread)
[2013/01/10 21:40:56.612965,  3] smbd/process.c:1294(switch_message)
  switch message SMBsesssetupX (pid 29106) conn 0x0
[2013/01/10 21:40:56.612976,  3] smbd/sec_ctx.c:310(set_sec_ctx)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0
[2013/01/10 21:40:56.612988,  3]
smbd/sesssetup.c:1436(reply_sesssetup_and_X)
  wct=12 flg2=0xc807
[2013/01/10 21:40:56.612996,  2] smbd/sesssetup.c:1391(setup_new_vc_session)
  setup_new_vc_session: New VC == 0, if NT4.x compatible we would close all
old resources.
[2013/01/10 21:40:56.613005,  3]
smbd/sesssetup.c:1190(reply_sesssetup_and_X_spnego)
  Doing spnego session setup
[2013/01/10 21:40:56.613015,  3]
smbd/sesssetup.c:1232(reply_sesssetup_and_X_spnego)
  NativeOS=[] NativeLanMan=[] PrimaryDomain=[]
[2013/01/10 21:40:56.613033,  3] libsmb/ntlmssp.c:747(ntlmssp_server_auth)
  Got user=[root] domain=[] workstation=[PC-DE-ALEX] len1=24 len2=186

thank for your help
-- 
Alexandre Priou