samba - Mar 2013 - samba4 replication failed after upgrade

Hello 

Replication failed . Forced replication with samba-tools also , with output as
below :

/usr/local/samba/bin/samba-tool drs replicate dc1 dc2
CN=Computers,DC=vizavi,DC=inc,dc1.vizavi.inc
Failed to bind to uuid e3514235-4b06-11d1-ab04-00c04fc2dcd2 for
e3514235-4b06-11d1-ab04-00c04fc2dcd2 at ncacn_ip_tcp:dc1[1024,seal]
NT_STATUS_NET_WRITE_FAULT
ERROR(<class 'samba.drs_utils.drsException'>): DRS connection to
dc1 failed - drsException: DRS connection to dc1 failed: (-1073741614,
'NT_STATUS_NET_WRITE_FAULT')
  File
"/usr/local/samba/lib64/python2.6/site-packages/samba/netcmd/drs.py",
line 39, in drsuapi_connect
    (ctx.drsuapi, ctx.drsuapi_handle, ctx.bind_supported_extensions) =
drs_utils.drsuapi_connect(ctx.server, ctx.lp, ctx.creds)
  File
"/usr/local/samba/lib64/python2.6/site-packages/samba/drs_utils.py",
line 54, in drsuapi_connect
    raise drsException("DRS connection to %s failed: %s" % (server,
e))


Could someone advice ?

samba -V
Version 4.0.3
( Was upgraded from Alfa16 )

cat /etc/issue
CentOS release 6.3 (Final)

Thanks,
Konstantin.