Grub can not boot Ubuntu, Boot error

[carsten]

Hi,

I have the following installation configuration:

On hard disk one (sda), I have OpenSUSE installed. On hard disk two
(sdb), I have Ubuntu 9.04, i386, installed. I would like to boot Ubuntu
with the OpenSUSE boot loader. Therefore Grub for Ubuntu is on sdb on
the root partition installed.

But every time when I try to boot Ubuntu, I get the following error
message: Error 13:Invalid or unsupported executable format

Below the Grub menu.lst from OpenSUSE:


###Don't change this comment - YaST2 identifier: Original name: linux###
title openSUSE 11.1 - 2.6.27.21-0.1
    root (hd0,0)
    kernel /boot/vmlinuz-2.6.27.21-0.1-pae
root=/dev/disk/by-id/ata-Maxtor_6E040L0_E16WY2PE-part1
resume=/dev/disk/by-id/ata-Maxtor_6E040L0_E16WY2PE-part2 splash=silent
showopts vga=0x346
    initrd /boot/initrd-2.6.27.21-0.1-pae

###Don't change this comment - YaST2 identifier: Original name: failsafe###
title Failsafe -- openSUSE 11.1 - 2.6.27.21-0.1
    root (hd0,0)
    kernel /boot/vmlinuz-2.6.27.21-0.1-pae
root=/dev/disk/by-id/ata-Maxtor_6E040L0_E16WY2PE-part1 showopts
ide=nodma apm=off noresume nosmp maxcpus=0 edd=off powersaved=off
nohz=off highres=off processor.max_cstate=1 x11failsafe vga=0x346
    initrd /boot/initrd-2.6.27.21-0.1-pae

title Ubuntu
    map (hd1) (hd0)
    map (hd0) (hd1)
    rootnoverify (hd1,0)
    makeactive
    chainloader +1



As you can see, I also tried the map option, but without success. It
would be great, if somebody could give me some advice how I have to
modify the menu.lst, that I can boot Ubuntu.

Thank you very much for your help.

Regards

Carsten