Navigational Control Button Problem?

[MobileBiz]

I've had the Sprint Diamond for about a week. I'm new to WM. I've notice that the navigational control rarley works the way I'd expect. Most of the time when I try and push it in a direction it simply acts as enter. For example; I can look at a call log and try and use it to move down, but the highlighted call detail is brought up. I would think it would work in calendar day view to move to the next day. Can someone give some examples of when and how to use this button. Maybe I have a defective device.

Thanks

EDIT: Found a thread about this issue. SORRY. HOW DO I DELETE THIS POST?