Santosh dharamsale

i sysprep the windows 7 image with some application and uploaded to WDS server when i started installation using VM Player after completing installation while configuring system details Pc name filed is disappear " your computer name is managed by your organizations's system administrator " getting this message. but when i installed same image using VM workstation i am able to keying PC name. what could be the problem. while sysprep my machine is joined to domain.