Sql Dependency doesn't work on iis

in my project sql dependency works fine, but when the same project publish and run on iis , doesn't work. actually i run the project as local an run the same project on iis at the same time and click something to fired sql dependency, in local fired but on iis project doesn't fire. the web site name in iis is test and i run this query : GRANT SUBSCRIBE QUERY NOTIFICATIONS TO "IIS APPPOOL\test" but doesn't work again