Menu not working

[judep]

Hi..
I've got a small problem, probably due to me not understanding something. After downloading, installing (mac os 10.3.9) and opening, I get a menu page...but can't select anything in the menu! I've seen some posts about mouse grabbing, but even after having selected the window (mouse then appears ABOVE the vdrift window, not behind it), I still can't select anything in the menu. Am I missing some extra software, or am I just technologically retarded?? Cheers