There was a package dependency problem.  The message was:

    To solve all dependencies for the RPMs you have selected, The following
    packages you have marked to exclude would have to be added to the set:
    
    Package Name                  	Reason For Skipping           
    ======================================================================
    kernel-2.6.8-1.526            	Pkg name/pattern              
    kernel-2.6.8-1.526            	Pkg name/pattern              
    kernel-BOOT-2.4.22-1.2193.nptl	Pkg name/pattern              
    kernel-debuginfo-2.6.8-1.526  	Pkg name/pattern              
    kernel-debuginfo-2.6.8-1.526  	Pkg name/pattern              
    kernel-doc-2.6.5-1.358        	Pkg name/pattern              
    kernel-doc-2.6.8-1.526        	Pkg name/pattern              
    kernel-module-nvidia-2.6.7-1.4	Pkg name/pattern              
    kernel-module-nvidia-2.6.7-1.4	Pkg name/pattern              
    kernel-module-nvidia-2.6.7-1.4	Pkg name/pattern              
    kernel-module-nvidia-2.6.7-1.4	Pkg name/pattern              
    kernel-smp-2.6.8-1.526        	Pkg name/pattern              
    kernel-smp-2.6.8-1.526        	Pkg name/pattern              
    kernel-source-2.6.5-1.358     	Pkg name/pattern              
    kernel-source-2.6.6-1.383     	Pkg name/pattern              
    kernel-sourcecode-2.6.8-1.521 	Pkg name/pattern              
    kernel-utils-2.4-12.1.142     	Pkg name/pattern              
    kernel-utils-debuginfo-2.4-12.	Pkg name/pattern              
    xorg-x11-6.7.99.902-4         	Pkg name/pattern              
    xorg-x11-100dpi-fonts-6.7.99.9	Pkg name/pattern              
    xorg-x11-75dpi-fonts-6.7.99.90	Pkg name/pattern              
    xorg-x11-ISO8859-14-100dpi-fon	Pkg name/pattern              
    xorg-x11-ISO8859-14-75dpi-font	Pkg name/pattern              
    xorg-x11-ISO8859-15-100dpi-fon	Pkg name/pattern              
    xorg-x11-ISO8859-15-75dpi-font	Pkg name/pattern              
    xorg-x11-ISO8859-2-100dpi-font	Pkg name/pattern              
    xorg-x11-ISO8859-2-75dpi-fonts	Pkg name/pattern              
    xorg-x11-ISO8859-9-100dpi-font	Pkg name/pattern              
    xorg-x11-ISO8859-9-75dpi-fonts	Pkg name/pattern              
    xorg-x11-Mesa-libGL-6.7.99.902	Pkg name/pattern              
    xorg-x11-Mesa-libGLU-6.7.99.90	Pkg name/pattern              
    xorg-x11-Xdmx-6.7.99.902-4    	Pkg name/pattern              
    xorg-x11-Xnest-6.7.99.902-4   	Pkg name/pattern              
    xorg-x11-Xvfb-6.7.99.902-4    	Pkg name/pattern              
    xorg-x11-base-fonts-6.7.99.902	Pkg name/pattern              
    xorg-x11-cyrillic-fonts-6.7.99	Pkg name/pattern              
    xorg-x11-deprecated-libs-6.7.9	Pkg name/pattern              
    xorg-x11-deprecated-libs-devel	Pkg name/pattern              
    xorg-x11-devel-6.7.99.902-4   	Pkg name/pattern              
    xorg-x11-doc-6.7.99.902-4     	Pkg name/pattern              
    xorg-x11-font-utils-6.7.99.902	Pkg name/pattern              
    xorg-x11-libs-6.7.99.902-4    	Pkg name/pattern              
    xorg-x11-libs-data-6.7.99.902-	Pkg name/pattern              
    xorg-x11-sdk-6.7.99.902-4     	Pkg name/pattern              
    xorg-x11-syriac-fonts-6.7.99.9	Pkg name/pattern              
    xorg-x11-tools-6.7.99.902-4   	Pkg name/pattern              
    xorg-x11-truetype-fonts-6.7.99	Pkg name/pattern              
    xorg-x11-twm-6.7.99.902-4     	Pkg name/pattern              
    xorg-x11-xauth-6.7.99.902-4   	Pkg name/pattern              
    xorg-x11-xdm-6.7.99.902-4     	Pkg name/pattern              
    xorg-x11-xfs-6.7.99.902-4     	Pkg name/pattern              

Unresolvable chain of dependencies:
xorg-x11  6.7.99.902-4                   requires libXp.so.6
xorg-x11-tools  6.7.99.902-4             requires libXp.so.6

Please modify your package selections and try again.