ok problem solved now successfully using dios mios 2.2 with usb loader gx 3.0
my solution install usbloader gx 3.0 ios249.wad file
uninstalled usbloader gx channel.wad
installed usbloader gx forwarder instead.
downloaded r1200_222 249 250 pack.
copied the 249 boot file in that pack over the one...