BBB boot from SD Card

Hi ,

I have made the SD card bootable and made partions as boot, rootfs. Under boot i have copied MLO,u-boot.img.uEnv.txt and zImage. Under rootfs i have copied the root file system. After that i inserted SD card into BBB and hold the S2 button during power up , after this i can observe all four LEDs will blink and immediately USER LEDs (D2,D3 and D5 )will glow one after another stays solid ON ( D4 is permanantly OFF). I have waited an hour and removed SD card then powered to BBB nothing is working.

what could be the problem ? Can any one one pls look into this.

Thanks & Regards,

Sudheer A.