Weapon/Armor Upgrade problem on Campaign Map

[Psychologic]

I'm trying to create custom versions of some official Starcraft 2 campaign maps (personal enjoyment). I've been able to get all of the units and abilities working, but I'm having trouble with the weapon/armor upgrades.

Basically, I can only research level 1 of the upgrades. I've tried "Tech Tree - Allow Terran Infantry Weapons Level 2 for player 1" and "Tech Tree - Allow the Engineering Bay - Upgrade Infantry Weapons Level 2 ability for player 1". Neither work.

Is there another way to enable them manually that I'm missing? They're available in the normal campaign, but the level that can be researched depends (I think) on the number of missions completed by that point.

 

[Psychologic]

I guess the real question is: How do the campaign maps limit the available upgrades?

The availability isn't hardcoded in the map file because it depends on the number of other missions completed... I just can't find where or how it checks.

Anyone know?