Xfree86 not booting

[Limb]

Hey.. I know this probobly has been asked a million times.. but i need some help. Just got Redhat linux installed.. and now when i boot, after it loads everything and shows the Text Login.. and it trys to start Xfree86.. it flickers on and off for a few times, and them comes up with a blue screen... which has weird text that i cant read (2 buttons, but cant read text). So i need to know how i can run Xfree 86 Setup or something so i can fix this.   Redhat Linux 8.0   Thanks, Limb