Web Service- Task was cancelled

I've to post data to my application using web service.My web application was earlier reachable through IP address and port number. Now that the URL is mapped to a DNS with SSL, the webservice is getting crashed without posting data. Is it because of the Domain Name in the web service URL , the service is getting cancelled? Please find the log below. Error in getService System.AggregateException: One or more errors occurred. ---> System.Threading.Tasks.TaskCanceledException: A task was canceled. --- End of inner exception stack trace --- at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions) at System.Threading.Tasks.Task1.GetResultCore(Boolean waitCompletionNotification) at System.Threading.Tasks.Task1.get_Result() at VICAS.VICASDLL.ServiceClass.getService(String url, String parameters) ---> (Inner Exception #0) System.Threading.Tasks.TaskCanceledException: A task was canceled.<---

Please suggest.