I have a little problem with my mod based on BI-the hordes are not reducing. When I take a city and settle, all the horde stay as they were. Do you know how to solve it? here is how I've got the settings;

horde_min_units 75
horde_max_units 140
horde_max_units_reduction_every_horde 45
horde_unit_per_settlement_population 300
horde_min_named_characters 8
horde_max_percent_army_stack 100
horde_disband_percent_on_settlement_capture 50
horde_disband_percent_on_settlement_capture 60
horde_disband_percent_on_settlement_capture 70
horde_disband_percent_on_settlement_capture 80
horde_disband_percent_on_settlement_capture 100

What should I change?