Hi I have a new Solo SE V2 for cable and have been trying all weekend to add Vix as the image

I have tried various versions
on numerous USBs
each with the correct procedure... power down add USB with files added to the root folder power up

Never a single change to the LED on the front and obviously to the image within.

The box info shows 'image: Experimental 2016-03-23 and
'Version: 2015-04-22-vuplus_experimental_factory

Any advice would be appreciated