Booting OMAP-L137 with pre-built images.

Hello, I am trying to boot from OMAP-L137 using pre-built images like in this wiki:

http://processors.wiki.ti.com/index.php/Serial_Boot_and_Flash_Loading_Utility_for_OMAP-L137

And all is ok, when I try to boot a simple led blinking application.

But nothing happens when I try to boot with pre-built images. Nothing is printed in a terminal prompt.

I use the next command:

./sfh _OMAP-L137.exe -flash_dsp dsp-spi-ais.bin ubl-spi.bin u-boot.bin

Booting successfully completes, I change boot switches and nothing happens.

I use psp of version 02_20_00_07.

Could someone help me?