[Samba] [samba] User managing via USRMGR.EXE is impossble

[Сергей]

Hello, All!

I have domain network. But user managing via USRMGR.EXE is impossble.
When I run USRMGR.EXE I get a window:
The tag is invalid. Do you want to select another domain to administer?

At this time at Samba's log:
[2010/01/11 14:12:07,  1] librpc/ndr/ndr.c:ndr_push_error(493)
  ndr_push_error(5): Bad char conversion
[2010/01/11 14:12:07,  0] rpc_server/srv_pipe.c:api_rpcTNP(2381)
  api_rpcTNP: samr: SAMR_QUERYDISPLAYINFO failed.

How to find source of error? 

Samba Version 3.3.9, Microsoft Windows XP [Версия 5.1.2600] SP3

Bye. Serg.