Laptop/HDTV connection - Picture not lining up

I have a Dell Inspiron 9400 laptop with an ATI X1300 (or maybe X1400) gpu.  Using the DVI connectors, I have been able to view my laptop through my Mitsubishi HDTV.  However, the screen is not lining up exactly when displayed on my tv.  Its like the tv is zoomed slightly so that I can only see the top part of the taskbar and the same is true for the top and sides of the screen.  I can't seem to figure out how to make it line up.  Can anyone help me solve this very annoying problem?