Finally, I rechecked my step nothing wrong. I tried to change ATAG but still the same, no bootlist kernel. It only boot omap1 internal Nand.
BTW I found the problem when reboot my device after u-boot-update. The bootmenu.src cannot read, then it was boot by internal Nand again. I opened /home/user/MyDocs/bootmenu.src with text editor but nothing there.

so anyone pls guide how about this http://talk.maemo.org/showpost.php?p...&postcount=256 How to edit u-boot-update script pls supervise.