How will I set time for session timeout in form authention?

I want to set session 1 minute in form authentication in asp.net MVC

below is my code I tried several ways but I failed to do so.

webconfig code:

custom filtration class

public override void OnActionExecuting(ActionExecutingContext filterContext)
{
if (HttpContext.Current.Session["UserInfo"] == null)
{
bool skipImportantTaskFilter = filterContext.ActionDescriptor.ControllerDescriptor.IsDefined(typeof(SkipImportantTaskAttribute), true) || filterContext.ActionDescriptor.IsDefined(typeof(SkipImportantTaskAttribute), true);
if (skipImportantTaskFilter == false)
{
filterContext.Result = new RedirectResult("~/Login/Index");
FormsAuthentication.SignOut();
HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
HttpContext.Current.Response.Cache.SetExpires(DateTime.UtcNow.AddHours(-1));
HttpContext.Current.Response.Cache.SetNoStore();
HttpContext.Current.Session.Abandon();
HttpContext.Current.Response.Write("");
HttpContext.Current.Response.Write("function ClearHistory()");
HttpContext.Current.Response.Write("{");
HttpContext.Current.Response.Write(" var backlen=history.length;");
HttpContext.Current.Response.Write(" history.go(-backlen);");
HttpContext.Current.Response.Write("}");
HttpContext.Current.Response.Write("");
return;
}
}
else
{
User user = (User)HttpContext.Current.Session["UserInfo"];
if (user.ForcePwdChange && filterContext.ActionDescriptor.ActionName != "CallChangePassword" && filterContext.ActionDescriptor.ActionName != "ChangePassword")
{
filterContext.Result = new RedirectResult("~/Login/CallChangePassword");
return;
}
}
}