Cpu goes for 100%

hey guys

my website working good until i use a hangfire job
then every request that goes on server make server cpu 100% (IIS)
but when i delete a job every thing is ok

i have not this isue before this new updates

what should i do?
and i checked it ;
its bec of this

        public void Configuration(IAppBuilder app)
        GlobalConfiguration.Configuration.UseSqlServerStorage(@"data source=.\MSSQLSERVER2014;initial catalog=admin;User ID=;Password=;MultipleActiveResultSets=true;App=EntityFramework"");
        var options = new DashboardOptions
            Authorization = new[]
            {new HangfireAuthorizationFilter()/*new LocalRequestsOnlyAuthorizationFilter()*/}
        app.UseHangfireDashboard("/JobDashboard", options);