And : Updating the kernel is required too.
Only the latest 'kernel-devel' is available with yum.
( The versions of kernel, kernel-devel must be identical.)
'2.6.32-71.el6' is an old version.
Current is : 'kernel-devel-2.6.32-279.14.1.el6'.
http://mirror.centos.org/centos/6.3/...i386/Packages/
# yum install kernel kernel-devel
... And then reboot to use the new kernel.
.