Load based ignition doesn´t seem to be doing anything

[gunni]

I wanted to test the Alpha-N setting where Ignition used calculated load, but at 5000rpm and 150kpa and 50% TPS (on the bench) the ignition is only the same as the bottom row of the ignition table.

Anybody have any details on how to set this up currently I have

Alpha-N
Before Throttle
Kpa
Load

Is this a firmware thing that needs enabling?