Seems you tried to activate theme for more than 1 project. According to Envato rules you can use 1 license for the 1 end project, we also allow to activate theme for the 1 dev domain.
In case you plan to use our theme for more than 1 domain you need to buy individual licence for every new project. For those who want to buy 5 and more licenses we have discount programm.
Please, let me know what is you main project site, you may post this info in Private Content area.
