Why can't I register my Elevate 5 MKII speakers?

Trying to register my Elevate 5 MKIIs. . . One minor issue though. MkII is not part of the drop-down list only Elevate 5 so I select Elevate 5 and I type in my serial number and I keep getting an invalid serial number notifications . Sent Alesis an email but maybe it got sucked into s black hole because i have yet to receive a response. Anyone able to shed some light on my Minor but extremely annoying situation?
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