connect from win2k pro RC2(2128)

[Gang Xing]

Dear all,

    I install win2k pro RC2(2128) and find I can not connect to the
samba server :-(
The win2k is work as work group. I can connect to our NT-server without
difficulty.
But when I try to connect the machine to samba server, the system
report:
    "Incorrect password and or unknown user"

I had modified the registry:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkStation\Parameters]

"EnablePlainTextPassword"=dword:00000001

And the smb.conf:
----------------------------------------------------------
[global]
  workgroup = workgroup
  server string = Samba Server
  security = share
  local master = no
  dns proxy = no
  password level = 4
  browseable = no
[homes]
   comment = Home Directories
   browseable = no
   writable = yes
   password level = 4
   create mode = 0750
   wide links = no
   hide dot files = no
   dont descend = ./etc,./usr,./var
-------------------------------------------------------

Any suggestion?

BTW: I can not change the samba server configuration.

Thanks in advance