can not connected box pleas help me

hi all
i have problem with miracle box
can not connected box
box not connected
with all version
im tired to find any solution for my problem
im read and read and read solution on this site and watched all videos but not working
when i connected box the led light stay luminous
and the computer find new device
prolific usb to serial comm port (com16)
what i can do?the box out off warranty
pleas help me