I can't seem to change my leader portraits

[funk]

Hello,
I have been experiencing problems in developing my mod, could I have some help?
When I start my game up, the name is there but the portrait is the default one
I have checked that I put the right file name but I'm at a loss. 
I've attached what the code looks like and some screenshots


create_country_leader = {

name = "Herr Führer"

desc = "POLITICS_ADOLF_HITLER_DESC"

picture = "Adolf_Hitler.dds"
expire = "1965.1.1"

ideology = nazism

traits = {

dictator

}

}