try the license tansfer utility instead, so you can export the license from your previous system to a file and then import the license on the new installation from that file.
Be careful, when starting the license manager to export the license you have to know the id of the destination workstation. So start on the new system the transfer utility, write down the id the dialog provides and use that id when exporting the license!
- alfred -
Not knowing for sure and you stated the Product key was N/A but I looked in the AutoCAD Knowledge base for Product keys.
Maybe 2009 is 001A1?
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Charles is right. The product key is 001A1 and so long as you never upgraded it past 2009 either manually or under Subscription, then it should still activate. You may need to send in your activation code to get a manual activation.