Ub 9.10 GRUB 2 failed to load new kernel

[nicepat]

I installed Ubuntu 9.10 released version from the ubuntu.com, and this is fresh installation with the default setting (English)
From the kernel 2.6.31-14-generic, I compiled vanilla kernel, which is from kernel.org. (2.6.31.5)
According to the document w/ GRUB 2 in 9.10, the kernel compilation has been chanced. I followed new steps, but new kernel loading failed.

I post my steps that I used to do in 9.04 or earlier version.

1. cd <kernel source directory>
2. make defconfig
3. make xconfig
4. make -j4
5. make modules_install
6. make install
7. mkinitramfs -o /boot/initrd.img-2.6.31.5 2.6.31.5

After this, I see the new kernel image 2.6.31.5.
8. update-grub

This is new change for 9.10, and make sure that /boot/grub/grub.cfg has been updated with the correct information.

Generating grub.cfg ...
Found linux image: /boot/vmlinuz-2.6.31.5
Found initrd image: /boot/initrd.img-2.6.31.5
Found linux image: /boot/vmlinuz-2.6.31.5.old
Found initrd image: /boot/initrd.img-2.6.31.5
Found linux image: /boot/vmlinuz-2.6.31-14-generic
Found initrd image: /boot/initrd.img-2.6.31-14-generic
Found memtest86+ image: /boot/memtest86+.bin
done

post a part of grub.cfg.
menuentry "Ubuntu, Linux 2.6.31.5" {
        recordfail=1
        if [ -n ${have_grubenv} ]; then save_env recordfail; fi
        set quiet=1
        insmod ext2
        set root=(hd0,1)
        search --no-floppy --fs-uuid --set 83f0eccd-2f0e-4179-9e90-bfecc2e7bae4
        linux /boot/vmlinuz-2.6.31.5 root=UUID=83f0eccd-2f0e-4179-9e90-bfecc2e7bae4 ro quiet splash
        initrd /boot/initrd.img-2.6.31.5
}
menuentry "Ubuntu, Linux 2.6.31.5 (recovery mode)" {
        recordfail=1
        if [ -n ${have_grubenv} ]; then save_env recordfail; fi
        insmod ext2
        set root=(hd0,1)
        search --no-floppy --fs-uuid --set 83f0eccd-2f0e-4179-9e90-bfecc2e7bae4
        linux /boot/vmlinuz-2.6.31.5 root=UUID=83f0eccd-2f0e-4179-9e90-bfecc2e7bae4 ro single
        initrd /boot/initrd.img-2.6.31.5
}

After rebooting the system, the new kernel load is failed. Post the screen shot.