Rebuild USRP2 FPGA image & firmware

Dear all,

I rebuild USRP2 FPGA image (Raw Ethernet) in ISE10.1 with sp3. And I
downloaded firmware Raw Ethernet, No WBX or XCVR (v3.3.1git) from Ettus
website. I flash SD card with rebuild FPGA image and downloaded
firmware. When plug in SD card and powered on USRP2, only bottom LED
light up.

If i flash SD card with downloaded fpga image and downloaded firmware,
two bottom LEDs light up.

Is this because of ISE version incompatibility used for FPGA build and
firmware? Or other possible cause, please adviceā€¦