Red Hat Enterprise Server 5.5
 

how come when I install usting text mode I can log in as root but when I use GUI I cannot it will not recognize the root password?

It's a security thing that's been around for a few versions now. Ideally, you should not allow root login remotely at all, or allow a root login locally via the GUI prompt.
You'll several qns on this if you search LQ.
Theoretically you can change it, but its not best practice to do so.
http://www.linuxtopia.org/online_boo...ion/index.html

Ps Welcome to LQ
:)

A good practice is to log in to the GUI as a regular user, then open a terminal and type:

to gain a root terminal for administrative tasks.

Thanks for the help