The premium themes moudle in pro-sites plugin not working

When I snstall the pro-sites plugin in my site.
Including premium plugin and premium suport moudles ,everything is ok,except the premium themes moudle.I deactive the themes I want those as premium and select the option in premiun theme moudle,But free account still can use them.How odd..But when set none is working,every accounts can not use them.How can I setup to have some premium themes for pro account?