NullReference error when running windows service

Hello all. I created a class that runs fine when using it with web forms, however when i create a Windows service and try to run it I recieve a NullReference error. Im not sure what else to do since the class works fine.Here is a snippet.
The service
 public partial class Service1 : ServiceBase
    {
       
        //Timer object
        Timer RunTime;

        QBridge bridge_object = new QBridge();

               double test_interval = 40000; //test value        

        public Service1()
        {
            InitializeComponent( ...