I tried also to give the following commands found here :
unfortunately without success. Any idea?
./mkimage -A arm -O linux -T kernel -C none -a 0x00008000 -e 0x00008000 -n Linux-2.6.32-5-kirkwood -d ../../boot/vmlinuz-2.6.32-5-kirkwood ../../boot/uImage ./mkimage -A arm -O linux -T ramdisk -C gzip -a 0x00000000 -e 0x00000000 -n initramfs-2.6.32-5-kirkwood -d ../../boot/initrd.img-2.6.32-5-kirkwood ../../boot/uInitrd
unfortunately without success. Any idea?