The IP address your domain name is pointing to is a premium hosting IP address. Did you upgrade the account to premium hosting? Then please contact iFastNet, our premium hosting partner, for help.
Additionally, I think this message is from Site.Pro. Premium hosting doesn’t support Site.Pro, so any Site.Pro websites will not work after migration. If you want to upgrade from free hosting and use Site.Pro, please consider getting a premium hosting plan from Site.Pro instead.