Adding a custom house to dinamic coat of arms

I follow all the steps that i found to add a custom house but isnt working. I create the coa and i name it lowen.tga, i put it in flags folder and in dynasties_westerlands.tga

In dinasties/Westerman.txt i wrote this:

802046 = {
name="Lowen"
culture = westerman
coat_of_arms = {
template = 0
layer = {
texture = 13
texture_internal = 54
emblem = 0
color = 0
color = 0
color = 0
}
}
used_for_random = no
can_appear = no
}

then i go to ###Westerlands### in dynamic_coa_effects.txt and i wrote:

if = {
limit = { holder_scope = { dynasty = 802046 } }
set_coa = c_lowen #Lowen

In dynamic_coa_titles.txt:

c_lowen = {
color={ 180 180 180 }
color2={ 255 255 255 }

allow = {
always = no
}
}

and i wrote dynasty = 802046 in dynamic_coa_events.txt

I added my house to the extint houses

So im missing something? why this dont work?