Grasshopper , I haven't a sdcard for that at the moment, I'll try at soon as possibile.
dtech , flash drive is not working. I was persuaded usb works fine, because I saw PS/2 mouse dmesg line, but LE print that line without mouse attached too, so this means nothing about usb. And mouse doesn't work anyway.
petediscrete , maybe you are right, and I have to choose a different way on this.
Anyway, thank you all guys for your support