I recently installed a new kernel but GRUB did not list the new kernel so I went into the GRUB.conf file and manually added the new Kernel. However it did not work. Can someone tell me what I did wrong? The current file is as follow:

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,7)
# kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00
# initrd /initrd-version.img
#boot=/dev/sda
default=2
timeout=15
splashimage=(hd0,7)/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.9-1.681_FC3)
root (hd0,7)
kernel /vmlinuz-2.6.9-1.681_FC3 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.9-1.681_FC3.img
title Fedora Core (2.6.9-1.724_FC3)
root (hd0,7)
kernel /vmlinuz-2.6.9-1.724_FC3 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.9-1.724_FC3.img
title Windows XP
rootnoverify (hd0,0)
chainloader +1

post what's in /boot

/boot/vmlinuz-2.6.9-1.724_FC3
/boot/vmlinuz-2.6.9-1.681_FC3
/boot/vmlinuz-2.6.9-1.667
/boot/System.map-2.6.9-1.724_FC3
/boot/System.map-2.6.9-1.681_FC3
/boot/System.map-2.6.9-1.667
/boot/initrd-2.6.9-1.724_FC3.img
/boot/initrd-2.6.9-1.681_FC3.img
/boot/initrd-2.6.9-1.667.img
/boot/config-2.6.9-1.724_FC3
/boot/config-2.6.9-1.681_FC3
/boot/config-2.6.9-1.667
/boot/.Trash-root
/boot/lost+found
/boot/grub