Modifying Marble Yields

[InkAxis]

I am using VP, and am having some strange issues with Marble.
I made a building that increases the culture of a couple resources, but it doesn't seem to work for marble.
For instance, when I tried the code below, it added the culture to Iron and Jade, but not Marble. I've checked the logs and don't see anything weird.

INSERT INTO Building_ResourceYieldChanges
            (BuildingType,              ResourceType,              YieldType,                  Yield)
VALUES      ('BUILDING_IA_EXAMPLE',    'RESOURCE_IRON',            'YIELD_CULTURE',            1),
            ('BUILDING_IA_EXAMPLE',    'RESOURCE_MARBLE',          'YIELD_CULTURE',            1),
            ('BUILDING_IA_EXAMPLE',    'RESOURCE_JADE',            'YIELD_CULTURE',            1);