I would think this is the correct display. I keep forgetting this is vista you are running. Sorry. In my windows 7. It has a place on the left side.Once the display Icon opens. If you click adjust resolution. It will tell you what is recommend for your monitor or screen in your case. I am not sure about where this is in Vista I have not used it for a while.
Ok , I did not think you were having problems.. I figure you just wanted to know if the resolution your laptop is set is right. Most of the time windows dose set most monitors to their native resolution. So I would rather think the laptops resolution is correct.