Thanks for the reply,
I imported the CVD while configuring the mirage management server.ie, before centralizing the CVD.i am using USMT4.0 which is part of windows AIK. i have installed the AIK and imported the USMT folder from c:\program files\windows AIK\tools\USMT.
C:\PROGRAM FILES\Wanova\Mirage Service\USMT is exists.
When i run C:\PROGRAM FILES\Wanova\Mirage Service\USMT_Migration.cmd, it executes migration code and giving no error on completion.