Did you ever booted into init 5 in your systempreviously ? Check Your /etc/inittab by logging as single user mode as root.
In case , if initdefault is set to 5 already, and failing to load the GUI, you can switch that to
and then you can configure GUI using
After saving that xfree86.config , you can get into 5 by typing "init 5" in the prompt.
The OTHER CASE is you can check your grub.conf in /boot/grub/grub.conf
kernel /vmlinuz-2.6.9-67.ELsmp ro root=LABEL=/1 rhgb quiet
If it has S or 1 , at the end of the above parameter, then it will boot into init 1.