LinuxQuestions.org - Failed to load module "ati" (module does not exist, after upgrad from Redhat 3 to 5.

I recently upgrading from Redhat Ent. release 3 to release 5. Now I can't get the video to work. It appears that I need to load the video driver but I haven't been able to find it. I may need to update Xfree86 but I'm not sure if that's the problem.

Any help would be appreciated. Here's more info to help with the diags....

Machine Type: Dell 2600 with a ATI Rage XL (Mach64)

When I type X here's what I get:

X Window System Version 7.1.1
Release Date: 12 May 2006
X Protocol Version 11, Revision 0, Release 7.1.1
Build Operating System: Linux 2.6.9-42.ELsmp i686 Red Hat, Inc.
Current Operating System: Linux tildbs01 2.6.18-8.el5 #1 SMP Fri Jan 26 14:15:21 EST 2007 i686
Build Date: 09 January 2007
Build ID: xorg-x11-server 1.1.1-48.13.el5
Before reporting problems, check
to make sure that you have the latest version.
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Mon Jul 23 14:59:03 2007
(==) Using config file: "/etc/X11/xorg.conf"
(EE) Failed to load module "ati" (module does not exist, 0)
(EE) No drivers available.

from xorg.conf:

[B]B]
Section "Device"
Identifier "Videocard0"
Driver "ati"
VendorName "Videocard vendor"
BoardName "ATI Mach64"

This is from the xorg.0.log

(II) Loading font Type1
(II) LoadModule: "ati"
(WW) Warning, couldn't open module ati
(II) UnloadModule: "ati"
(EE) Failed to load module "ati" (module does not exist, 0)
(II) LoadModule: "mouse"
(II) Loading /usr/lib/xorg/modules/input/mouse_drv.so
(II) Module mouse: vendor="X.Org Foundation"
compiled for 7.1.1, module version = 1.1.1
Module class: X.Org XInput Driver
ABI class: X.Org XInput driver, version 0.6
(II) LoadModule: "kbd"
(II) Loading /usr/lib/xorg/modules/input/kbd_drv.so
(II) Module kbd: vendor="X.Org Foundation"
compiled for 7.1.1, module version = 1.1.0
Module class: X.Org XInput Driver
ABI class: X.Org XInput driver, version 0.6
(EE) No drivers available.

Fatal server error: