ERXP "SystemId Entered does not match the SystemId on record for this Serial"

[Biosphere]

Hello,

I recently purchased a used Eleven Rack, and the expansion pack yesterday.

However, when trying to activate using the updater I get the error message listed in the title. This is a Windows 8.1 system (which comes with IE 10 by default).

I have entered every possible variation (checking for white spaces/changing charger etc) of serial and system is from the order confirmation e-mail I received after buying expansion, but no luck.

I have contacted support, but they're only sending me irrelevant KB articles.

I believe (and the error message pretty much states this) that the previous owner regged the unit, and that activation fails due to this.

FW version is 1.0.1.

Can anyone help?

http://protools.ideascale.com/a/dtd/178509-3779