Problem with group policy deployment

Hi,

I'm still trying to deploy AutoCad LT 2004 through group policy. I
managed te create an installation share. I configured the group policy
object and the client computer starts installing on reboot. However, I
allways get the following error:

Setup is unable to validate your serial number. Please initiate a
REINSTALL via the command line, using the following syntax.
(the following should appear on one command line.)

msiexec /i <full path to original MSI installation database>
REINSTALL=ALL ACADSERIALPREFIX=nnn ACADSERIALNUMBER=nnnnnnnn
ACADFIRSTNAME=<firstname> ACADLASTNAME=<lastname>
ACADORGANIZATION=<companyname> ACADDEALER=<dealername>
ACADDEALERPHONE=<dealerphone>


now i have 2 theories on this:
1) Could it be that ACad installer attempts to acces the internet for
validation? In that case is it possible to work around this 'cause our
firewall requires a log-in
2) Do I need a special Volume License number or something like with
Office?


thanks
Jo Harding

 

anyone?