AI won't build stations or ships, because of new upkeep maybe?

[erdrik]

Ive been working on a mod that adds a bit of food to the upkeeps of ships and stations, Implemented in 00_ship_sizes.
Example:

    resources =
    {
        category = station_researchers
        cost =
        {
            minerals = 100
        }
        upkeep =
        {
            energy = 1
            food = 0.125
        }
    }
#------------------------------------- vanilla below

Now the AI won't build any new outposts, starbases, research or mining stations, or ships.
I did some research and implemented additions to 00_common_categories:
Example:

    ai_use_parent_for_resources_upkeep =
    {
        energy
        food
        alloys
    }
#------------------------------------- vanilla below

and 00_food_budget:

food_upkeep_stations =
{
    resource = food
    type = upkeep
    category = stations

    potential =
    {
        is_lithoid_empire = no
    }

    fraction =
    {
        weight = 1
    }
}
[code]


But it didn't work. AI still won't build stations or ships. They only start building them again if I remove the food upkeep from [B]00_ship_sizes[/B]. Is there another file I need to edit or am I doing something wrong?
Any help would be much appreciated.