USRP2 fpga image rebuild with ISE12.2

Hi all,

I downloaded USRP2 fpga code from And I rebuild the
code by using : make bin under u2_rev3 folder.
I manage to get u2_rev3.bin file.

And I downloaded firmware, “Raw Ethernet, No WBX or XCVR” from

I flashed them into SD card using flashtool command as advised on ettus
website. But I only see “F” led light up. What could be the problem?