6410 can't boot from SD Card

Hi Gentlemen,
I met one problem need your help to solve it.
I base on reference design circuit to make an evaluation board, but removed
some functions that I don't need (such as like WiFi, Camera, Audio),
basically, the evaluation board can work normal, excpet SD function.
I found my evaluation board can't boot from SD card, I have checked my SD
card by PC and 6410 EVK (bought from Arm9Home), the SD card can work normal
as no problem.
I have also compared circuit design with reference circuit, but I can't
find any difference.
Can anybody help me to solve this problem.
I'm much appreciating for your any help.

Thanks.

Best regards,

Joseph

Have you used the SD-FLASHER utility with SuperBoot-6410.bin?

insert the SD card in your pc and open SD falsher.exe on xp or run it as
Administrator on win7 or win8 and then format is and browse
superBoot-6410.bin then make fuse
it will  make two partitions 130 M which will be disappear and the still
with the name FRINDLYARM
go inside it and make new folder (rename it to images ) 
and go inside it again and put ARMFRINDLY.ini and the  SuperBoot-6410.bin
and make another folder inside images and rename it to linux 
and put inside it
1) zImage_n43  or your zImage
2) rootfs_qtopia_qt4.ext3        if you will run it only
3) rootfs_qtopia_qt4.img  if you will install 

go back and edit the ARMFRINDLY.ini as 

#This line cannot be removed. by FriendlyARM(www.arm9.net)

LCD-Mode = Yes
LCD-Type = N43

CheckOneButton=No
Action=install
OS= Linux

VerifyNandWrite=No

StatusType = Beeper| LED

#################### Linux #####################
Linux-BootLoader = superboot-6410.bin
Linux-Kernel = Linux/zImage_n43
Linux-CommandLine = root=/dev/mtdblock2 rootfstype=yaffs2 init=/linuxrc
console=ttySAC0,115200
Linux-RootFs-InstallImage = Linux/rootfs_qtopia_qt4.img
Linux-RootFs-RunImage = Linux/rootfs_qtopia_qt4.ext3


*****************
then insert SDcard into your arm kit and push the left button to s2 to boot
from SDcard and use the second left button to go down and use the right
above one to select and then the instalation will begin 
at the end return the left button to boot from amr mini6410 

i hope i could help you :)