sqlite query not working in background in winrt

I've created a winrt project. I'm using two methods one for inserting the data and other for fetching the data.I'm trying to save the data during a time trigger event. The data is not saved when I'm inserting the data in background. When I'm inserting a data using the same method on a button click event the code is working. Here is the code where I'm calling the method to insert the data:

public sealed class BackgroundTask:IBackgroundTask
    {
        public void Run(IBackgroundTaskInstance taskInstance)
        {
            ToastTemplateType toastTemplate = ToastTemplateType.ToastText02;            
            XmlDocument toastXml = ToastNotificationManager.GetTemplateContent(toastTemplate);            
            XmlNodeList textElements = toastXml.GetElementsByTagName("text");            
            textElements[0].AppendChild(toastXml.CreateTextNode("Background Task"));            
            textElements[1].AppendChild(toastXml.CreateTextNode("I'm message from your background task!"));            
            Database d = new Database();
            d.saveData("new entry"); //calling the method to insert the string
            ToastNotificationManager.CreateToastNotifier().Show(new ToastNotification(toastXml));
        }
    }

The 'saveData'method:

public async void saveData(string data)
        {
            SQLiteAsyncConnection connection = new SQLiteAsyncConnection("TimeDb.db");
            try
            {
                var Db = new Database() { 
                    Data = data
                };                
                await connection.InsertAsync(Db);
            }
            catch (Exception ex)
            {

            }            
        }