We discovered that there is a serial number mismatch on a group of Helix Rack units that will affect their ability to be registered.
If your unit's serial number includes 6603-6607, please register the serial number label that is attached on the unit, not the serial number label attached to the box. If you run into further registration issues, please contact our support team with a support ticket at www.Line6.com/support/tickets.
We apologize for any inconvenience you may experience.