Problems tweaking two National Wonders

[BARBEERIAN]

I'm having a weird problem changing the National Epic and Oxford University. I just want to set them to require 5 of their prereq building instead of one in every city, it's a very minor change (and works fine for all other stock NW's I've changed) but refuses to work properly for these two and I'm stuck as to why. I tried isolating them to their own mini-mods and playing with them but they simply refuse to work. I've checked and re-checked for dumb things like spelling errors, etc causing the files not to be loaded and couldn't find any. All I've managed to figure out is that it's simply not loading any of the code for them (no changes take place, not even the text changes or junk like that).

Here's the code for the National Epic (Oxford Uni code is virtually identical so I'm not gonna bother posting it).

<GameData>

	<Language_en_US>
		<Update>
			<Where Tag="TXT_KEY_BUILDING_NATIONAL_EPIC_HELP" />
			<Set Text="+50% [ICON_GREAT_PEOPLE] Great People generation in this City.[NEWLINE][NEWLINE]Requires 5 Monuments." />
		</Update>

		<Update>
			<Where Tag="TXT_KEY_BUILDING_NATIONAL_EPIC_STRATEGY" />
			<Set Text="This National Wonder increases a city's Great People generation by 50%. It also provides +1 culture." />
		</Update>
	</Language_en_US>

	<Buildings>
		<Where Type ="BUILDING_NATIONAL_EPIC" />
		<Set GreatPeopleRateModifier="50" />
	</Buildings>

	<Building_PrereqBuildingClasses>
		<Update>
			<Where BuildingType="BUILDING_NATIONAL_EPIC" BuildingClassType="BUILDINGCLASS_MONUMENT" />
			<Set NumBuildingNeeded="5" />
		</Update>
	</Building_PrereqBuildingClasses>
  
</GameData>