X won't start at bootup but will start at prompt with startx

[Dave Martini]

I have a RHEL5 machine where X window display won't start when the
machine boots up. I get the option to reconfigure it but the settings
are correct.
When I have it drop me to a system login prompt without X and I log
in and type startx it works.

Anyone know what might be going on here?

Thanks.
Dave Martini
LLNL