Madden 07 Problem

[mrz0gz]

Here it is.... Ive just bought madden 07 off the internet and installed the cd to my computer everything worked fine... i went through the install and played the game and everything was perfect great game..BUT i also tired installing madden 07 (same Cd's w/ same serial number) on my laptop but i can't get past the install process ? after i punch in my serial number it continues to the EULA (license agreement) and its empty ? i don't see any letters ? i click continue anyways and it comes to a screen where it says my directX is too old, but i know thats not the case because i went to Microsoft page and downloaded the latest directx drivers. I've played all the latest games on this laptop bf2,prey, fear and madden 06, so i know my graphics card can handle this game. my laptop is a xps m170.(my battery is safe) Could it be that I'm using the same serial key ? for both computers.