Just wasted my time trying to debug why the Timer control (from the Toolbox under Components) on my Windows Service project was not working at all.  Then I tried explicitly creating a Timer object from the System.Timers.Timer class and now it is working.

One thing I noticed though is that when I used the Timer control, the event that is fired when the interval has elapsed is the Tick event while when I used the Timer object from the System.Timers.Timer class, the event fired is the Elapsed event.  Found out that they are different because the Timer control is created from the System.Windows.Forms.Timer class.