System.timers.timer stopping on its own

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C#

IIS

time

MVC5

There seems to be a problem with Timers in csharp in a windows server environment.I have a timer in my application that fires every minute but it stops after about 2 days and i am dumbfounded as to why this is happening.

I have tried these timers on an mvc application as just simple url calls to an internal API which works really well on windows 7 and on a server environment stops after almost 2 days. My source code:

Update: It seems as though the timer stops around the app pool recycle.Is there a setting that i need to configure in order for the app timer to start again?

int smsCounter = 0;
       int smsCounterQuery = 0;
       protected void Application_Start()
       {
           // Dynamically create new timer
           Timer smsTimer = new Timer
           {
               Interval = 1000,
               Enabled = true
           };

           // Add handler for Elapsed event
           smsTimer.Elapsed += CallUrls;
           smsTimer.Stop();
           smsTimer.Start();

           AreaRegistration.RegisterAllAreas();
           GlobalConfiguration.Configure(WebApiConfig.Register);
           FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
           RouteConfig.RegisterRoutes(RouteTable.Routes);
           BundleConfig.RegisterBundles(BundleTable.Bundles);
       }

       public void CallUrls(object sender, ElapsedEventArgs e)
       {
           smsCounter++;
           smsCounterQuery++;

           if (smsCounter == 60)
           {
               //local pc url:
               //string url = "http://localhost:49788/Sms/sendMultiSMS";

               //server url:
               string url = "http://localhost:105/Sms/sendMultiSMS";
               var request = (HttpWebRequest)HttpWebRequest.Create(url);
               request.Method = "GET";


               using (StreamWriter writer = new StreamWriter("C:\\In\\smsheartbeat.txt", true))
               {
                   writer.WriteLine("Run SMS Sending method at time: " + DateTime.Now.TimeOfDay);

               }


               smsCounter = 0;
           }

           if (smsCounterQuery == 600)
           {
               //testing:
               //string url = "http://localhost:49788/Sms/sendLogByDate";

               //server url:
               string url = "http://localhost:105/Sms/sendLogByDate";
               var request = (HttpWebRequest)HttpWebRequest.Create(url);
               request.Method = "GET";
               var response = (HttpWebResponse)request.GetResponse();


               using (StreamWriter writer = new StreamWriter("C:\\In\\smsheartbeat.txt", true))
               {
                   writer.WriteLine("Date range search url method fired at time: " + DateTime.Now.TimeOfDay);

               }

               smsCounterQuery = 0;
           }

       }

What I have tried:

I have tried Threading timers as well and that is even worse as it stops completely after about 10 mins.