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trying to boot from emmc over usb

hi,

I was trying to port  Angstrom over eemc using usb i was following this link

http://processors.wiki.ti.com/index.php/Sitara_Linux_AM335x_Flash_Programming_Linux_Development#eMMC_Programming_Process

while porting everything works fine upto the built in ARAGO Image ,the boot prompt came up and i thought the flashing is over or something is wrong ,i pluged out the power and when i tried powering it on it gets stucked at  "reading u-boot .img" , later i tried the port through sd-card and the problem is BBB is not identifying the sd-card ,so I am a kind of worried can i boot this bb again or not.Any help/guidence in this case would be appreciated.

i am attaching a snapshot of the current situation.

thanks,

sumit