He needs to go to
https://autoreg.autoregister.net, as his pc needs to be re-provisioned to the CM
You should of been auto-redirected to the BIA Computer Provisioning page on opening your browser
This is what I had to do after upgrading temporary to 1Mb on Pace STB, then again to 2Mb on my new Samsung STB
Any changes to your BB tier, requires you to re-provision the pc to the CM/STB again, else the CM/STB stays in the pre-reg state