DCT4 Flasher Help

I have the MCU/PPM DCT4 Flasher now, it seems to reset the SP locks & security code no problem but I run into problems when I try and upgrade my 6310 v4.20. I have v 5.01 MCU + PPM but I find the flashing software ahrd to use due to my unfamiliiarity with it

Could anyone please give me a step by step introduction on how to upgrade the 6310 please, it would be really appreciated. When I try I keep getting errors like "Mbus not respond" & "Invalid Model descriptor".

Thanks people,

Seany