Trying to update V2 firmware.. getting error "version verification error: 307"

[Alvin]

Hi,

I'm trying to update the firmware in my V2 cable so that I can use V8 and a new autocal.

The boot block version is 2.04.07
The Firmware version is 2.04.57
and I'm trying to first install FSProg_V2_4_72.ffw


Help!