Hwk update client problem

pls support me

when i separate update computer it will give the below log
Upgrade log:
---------- HWK Update Client v 2.1.0.0 ----------
---------- HWK raise started:6/1/2011 11:32:12 AM ----------
-- Target Id : 62 CF 1 10
-- UFSx Boot : UFxBoot V2.2 (c) SarasSoft 2003.
-- UFSx Firmw.: UFS_USB V2.8 (c) SarasSoft 2007.
-- UFSx S/N : xxxxx
-- Features : 00000001
-- Licence 5 : True
-- UFSx Vendor: TORNADO
-- HWK ID : A1.04-PRO1-C8DBF9274360007B
-- HWK Status : 1, DL: 0
----------
Locating HWK Upgrade server...
HWK Upgrade computer found!
Preparing unification to server...
Connecting to HWKUpgrade server...
Server unification successfully established.
Authenticating on server...
Authentication initiate error: Error: Server returned unacknowledged reply

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