RedHat 4 (Nahant Update 8) 升级后启动顺序出错请大家帮忙！

系统：Red Hat Enterprise Linux ES release 4 (Nahant Update *)
多次升级后：Red Hat Enterprise Linux ES release 4 (Nahant Update 8)

现遇到问题：
启动时总是从 以前的第一个启动项启动， 需要接键盘手选择，倒数第二个菜单项 方可进入系统，
我以试过修改：/etc/grub.com default=3 从1-3 都试了 不行，，请各位高手大大帮帮忙！！
下面是我的 配置内容！！
[root@os ~]# cat /etc/grub.conf
# 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 (hd0,0)
# kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol01
# initrd /initrd-version.img
#boot=/dev/sda
default=3
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title Red Hat Enterprise Linux ES (2.6.9-89.0.23.EL)
root (hd0,0)
kernel /vmlinuz-2.6.9-89.0.23.EL ro root=/dev/VolGroup00/LogVol01
initrd /initrd-2.6.9-89.0.23.EL.img
title Red Hat Enterprise Linux ES (2.6.9-89.0.23.ELsmp)
root (hd0,0)
kernel /vmlinuz-2.6.9-89.0.23.ELsmp ro root=/dev/VolGroup00/LogVol01
initrd /initrd-2.6.9-89.0.23.ELsmp.img
title Red Hat Enterprise Linux ES (2.6.9-42.ELsmp)
root (hd0,0)
kernel /vmlinuz-2.6.9-42.ELsmp ro root=/dev/VolGroup00/LogVol01
initrd /initrd-2.6.9-42.ELsmp.img
title Red Hat Enterprise Linux ES-up (2.6.9-42.EL)
root (hd0,0)
kernel /vmlinuz-2.6.9-42.EL ro root=/dev/VolGroup00/LogVol01
initrd /initrd-2.6.9-42.EL.img