You seem to have maybe missed some steps.....
Please review;
http://fedora.redhat.com/docs/releas...ata/#sn-kernel
starting at section '7.2.2.3. Preparing for Kernel Development' this does apply to the RHEL source kernel.
Short and sweet (or down and dirty) kernel build steps (after following the instructions from the link above);
make mrproper
cp /boot/kernel-<version_number_here> .config
(copies/makes a working configuration file)
make xconfig (to edit for your hardware and desired changes)
Optional; Edit the Makefile to match your kernel version
make (takes the place of make bzImange and make modules, get used to it.)
make modules_install
make install