Boot up problem with Crazy Taxi 2 - Eurasia Release

[Trunks]

I just reburned my friend's copy of Crazy Taxi 2, and everything works fine, it goes all the way to the Eurasia screen. BUT once i press start to enter the game, the dreamcast goes back to the default screen (you know, when you don't have a game inside? the one that shows the date and memory card stuff, blue, etc etc)