I recently purchased an Inspiron 600m. I frequently use the volume buttons located above the keyboard (above the F buttons). When I first used the buttons, a display would appear on the screen that showed me how much I was adjustng the volume. Now, however, this display does not come up when I use the buttons and I am not able to see exactly how much I am adjusting the volume. I have no idea why this no longer appears. Is there a setting which enables/disables this display? I would really like this enabled.

I would appreciate help if anyone can offer it, thank you.