rise of nations doesnot run in widescreen on 1 laptop

i have two laptops. one toshiba with vista busines and one macbook with vista
ultimate.

both are widescreen

on toshiba, RON T&P runs in widescreen mode. on macbook, when i installed xp
sp2, RON did run wide screen. but now i have vista and RON doesnot run wide
screen. it runs in a 4:3 resolution of 1024x768. there are no other
resolutions listen in the options either.

can anyone tell me why this is the case...that its runs wide screen on one
vista machine but not on another? i have the latest boot camp version (read
vista drivers for macbook) installed.

any solutions?
Neerav