Kernel Stopps while trying to start

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Hi All,
I am using an ARM Versatile Platform Baseboard it comes with embedded linux image in its flash and it boots correctly no problem, I am working in a project that need to make nfs with embedded linux, I tried to change in environment variables to load linux kernel from flash and make nfs with my pc but the problem that the system stops every time at starting kernel
The default Environment variables are:

bootdelay=2
baudrate=38400
ethaddr=00:02:F7:00:1E:38
bootfile=/tftpboot/uImage
filesize=113a60
fileaddr=7FC0
bootcmd=cp 0x34080000 0x7fc0 0x81000  ; bootm
bootargs=root=/dev/mtdblock0 mtdparts=armflash0:19232k@0x2c0000(cramfs) console=ttyAM0 mem=128M
stdin=serial
stdout=serial
stderr=serial
verify=n

I changed it to:
bootdelay=2
baudrate=38400
ethaddr=00:02:F7:00:1E:38
bootfile=uImage
filesize=113a60
fileaddr=7FC0
netmask=255.255.255.0
ipaddr=172.21.0.180
serverip=172.21.0.10
bootcmd=cp 0x34080000 0x7fc0 0x81000 ; bootm
bootargs=root=/dev/nfs rw console=ttyAM0 mem=128M nfsroot=172.21.0.10:/export/arm/root
stdin=serial
stdout=serial
stderr=serial
verify=n

I also tried to verify that the board can connect to the pc and make it load the image from the pc using tftp and it worked fine but after loading the kernel I tried to run it by bootm but it stopped also at starting kernel

what's wrong i am doing, please tell me.

Best Regards,
Ahmed Barakat



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