Problem with the new F_CORE for M3iZERO

If you didn't already know M3 have now released there fix for the ZERO to bypass the update and it is available however I am having a problem with getting it to work. I have just the F_CORE.dat file and the 1.4X system on my micro sd and then put the cable into my computer and M3 and the red light just stays on without flashing. I know for a fact that it has never been updated to bypass this update and so am therefore wondering why I am having this problem

You'll need to wait for at least 30 seconds for the updating.

Yes but I have just said that the red light stays on for as long as it is plugged in without flashing meaning it isn't updating.

Do you actually have the 1.4 on your DSi?