issue with openmultiboot

Hi Guys,

i have an issue with openlultiboot for the forst time in years. i admit i do not understand. i tried 3 usb sticks and 3 images on flash (openatv 6.4/6/3 - openblackole 4.4 - blackhole 3.1.0) on my duo2 and i installed 4 images some of them backups and no one of them could boot. i really understand. i do what i used to do for years. any help please