Why can my outdated laptop run swtor but not wow?

I have a old Asus A7k series laptop that I casually play Starwars the old republic on. It is alittle choppy at times but I manage. If I try to run World of Warcraft on it the screen flickers black and white badly then goes black and shuts the computer down. I don’t understand. Swtor is a much newer game with better graphics. So why does my laptop run that but now wow? Amd Turion 64×2 2.00 Ghz , ATI Radeon HD 2600, 2 GB of ram. The drivers are up to date.