OMAP - L137 EVM boot

Hi,

I'm trying to boot the ARM & DSP on the Spectrum digital OMAP-L137 EVM (Rev I), I"m writing the files 

- dsp-spi-ais.bin to spi flash address 0x0

- ubl-spi.bin to spi flash ox2000

- U-boot.bin to spi address 0x8000

the writing to the spi flash using the flash writer works fine but when I'm changing the boot mod dip switch to SPI boot nothing happened, any reason why?

Thanks,

HR