impossible to write the kernel with tiny210v2

are three days I'm trying to flash the kernel image with superboot but no
result.
I used superboot as documentation, created "images" directory in the FAT
partition and copied the right files.
I set the switch to sdBoot and powered the board but no message appears in
the serial monitor and the display is white, no alarm buzzer or LED
indications.
What is the problem? Someone was able to write the kernel in a tiny210v2?

Hi Marco,
Did you fund a solution for this problem?
I am also stuck in this point. 
I would appreciate any help here.

Did you use SD-Flasher to prepare the SD?