xen kernel is not booting- ERROR 13 !!

[yashodhar]

sir,

i have installed xen and ether patch successfully now whenever i boot
in xen kernel it shows ERROR 13 : error 13 invalid or unsupported
executable format .

my menu.lst is as below
======================
title XEN/ETHER, kernel 2.6.26-2-xen-amd64
root (hd0,0)
kernel /boot/xen-3.1.0.gz dom0_mem=512M
module /boot/vmlinuz-2.6.26-2-xen-amd64 root=/dev/sda1 ro quiet
module /boot/initrd.img-2.6.26-2-xen-amd64
title Debian GNU/Linux, kernel 2.6.26-2-xen-amd64
root (hd0,5)
kernel /boot/vmlinuz-2.6.26-2-xen-amd64 root=/dev/sda6 ro quiet
initrd /boot/initrd.img-2.6.26-2-xen-amd64
title Debian GNU/Linux, kernel 2.6.26-2-xen-amd64 (single-user mode)
root (hd0,5)
kernel /boot/vmlinuz-2.6.26-2-xen-amd64 root=/dev/sda6 ro single
initrd /boot/initrd.img-2.6.26-2-xen-amd64
title Debian GNU/Linux, kernel 2.6.26-2-amd64
root (hd0,5)
kernel /boot/vmlinuz-2.6.26-2-amd64 root=/dev/sda6 ro quiet
initrd /boot/initrd.img-2.6.26-2-amd64
title Debian GNU/Linux, kernel 2.6.26-2-amd64 (single-user mode)
root (hd0,5)
kernel /boot/vmlinuz-2.6.26-2-amd64 root=/dev/sda6 ro single
initrd /boot/initrd.img-2.6.26-2-amd64
### END DEBIAN AUTOMAGIC KERNELS LIST
title Other operating systems:
root
title Microsoft Windows XP Professional
root (hd0,0)

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