[ltp] Is there is way to have a better resolution than 1024x768 on a R51 ??

[MG]

Hi List,

I bought a new Think Pad R51 model with ATI 7500. I can not get a better
resolution than 1024x768 with Xorg on Fedora Core 3 on the LCD 15"
screen...

Is there a way someone know to get something better ? Do I have to change
something ? I tried a lot of settings in my xorg.conf but unsuccessfully.
It says in the Xorg.0.log that the screen can not do better than 1024x768.
How is it possible as this is a beautiful 15" screen ?...
I have setted the bios to use AGP and internal screen as default display.

Please help, thanks.

Maxime