cant process update

ok guys i got an old phat given to me with rrod, so ive done the hybrid clamp fix and its up and running on dashboard 2.0.9199.0

i know i could jtag this but i have jtagged slim already and basically wanted to flash the drive on this to go live

ive checked the drive and it had a flashed lite-on so ive returned it to stock to update the dash

but i cant get the dash to update either by wifi or usb and i have tried 3 diff dashes not just the latest all i get is cant process this update if the problem persists etc

now what?

im thinking the lite on is the wrong drive for this phat and if it is how would i go about finding out which drive i should have etc

any advice appreciated