Hi Guan,
Sorry for the inconvenience. We’ve had a few other reports regarding this issue recently, but we are working on upgrading our entire licensing system to resolve this. I’ve activated your license from within our system. If you want to manually change, add, or remove a domain from your license, you can login to your account, and click View Licenses next to your order. From there you click Manage Sites, to make your domain changes. This should work for now, until we finish the update.
If you do have any further issues with activation, you can post for Support, and a member of our Support Team will help you get the issue resolved.
Thanks,