Hello i'm new to modding so i'm sorry if this has been posted a million times 
I'm trying to alter how polders and some other features function but i cant get it to work.
I followed this guide and came up with this code:
When i edit the default xml files in the game it works fine or something from the base game like this does seem to take effect:
Is there something else you need to do to alter dlc content? Or am i missing something? Thanks in advance

I'm trying to alter how polders and some other features function but i cant get it to work.
I followed this guide and came up with this code:
Code:
Update Improvements
SET Housing=2
WHERE ImprovementType='IMPROVEMENT_POLDER';
When i edit the default xml files in the game it works fine or something from the base game like this does seem to take effect:
Code:
UPDATE Improvements
SET Housing=2
WHERE ImprovementType='IMPROVEMENT_FARM';
Is there something else you need to do to alter dlc content? Or am i missing something? Thanks in advance