OmapL138EVM Boot lose

The reason of above problem is that I try OMAP-L138 SPIWriter example  of OMAP-L138_FlashAndBootUtils_2_23.

I am operated as follows:

      1、Will you be writing a UBL image? (Y or y)                                ---------Y

      2、Enter the binary AIS UBL file name (enter 'none' to skip):    ---------test_led.bin

      3、Enter the application file name (enter 'none' to skip):           ---------test_led.bin

      4、Enter the app image load address (in hex):                           ---------0x80000000

      5、Enter the app image entry point address (in hex):                ---------0x80000000

After I reset EVM board,I find DDR not can initialization. XDS560 can not  normal conjunction EVM board. 

A lot of example not ability the normal download adjust to try.

How to work out this problem?     Hope to urgently reply!

The flashwriter tool includes ubl files in <install directory>\OMAP-L138\GNU\ubl\