The old Redhat EL 5.0 = year 2007 is not supposed to be used anymore.
The 2011 version is RHEL 5.7 ( Is an updated 5.0 ).
Soon to come : RHEL 5.8
http://distrowatch.com/index.php?dis...h=all&year=all
EL 5.0 is not supposed to work in a "2012 computer".
Please use EL 5.7 or 6.2 .
.