Event problem

[SoTAL]

#############################################
###### Mexico - Unite central america?
#############################################
event = {
id = 77778
random = no
country = MEX

trigger = {
exists = ENG
}

name = "EVT_77778_NAME"
desc = "EVT_77778_DESC"
style = 0
picture = "ScreenSave12"

date = { day = 8 month = january year = 1936 }

action_a = {
name = "ACTIONNAME89898A" # Yes! Let's conquer them.
command = { type = addcore which = 718 }

command = { type = addcore which = 758 }

command = { type = addcore which = 746 }

command = { type = addcore which = 757 }

command = { type = addcore which = 717 }

command = { type = addcore which = 760 }

command = { type = addcore which = 748 }

command = { type = addcore which = 759 }

command = { type = addcore which = 890 }

command = { type = addcore which = 539 }

command = { type = addcore which = 803 }

command = { type = addcore which = 540 }

command = { type = addcore which = 813 }

command = { type = addcore which = 888 }

command = { type = addcore which = 812 }

command = { type = addcore which = 889 }

command = { type = addcore which = 804 }

ai_chance = 100
}
action_b = {
name = "ACTIONNAME77778B" # Me = Chicken
command = { type = dissent value = 2 }
ai_chance = 0
}

}

Anyone know what is the problem with this event? (Exists = ENG is just to have a trigger, as I thought that not having any triggers might screw it up.)

It's located in E:\Spill\World in Flames - Gold\db\events\event.txt

It's the only event in that particular text file. Should it be somewhere else?

Is that ai_chance = 100 rightly placed?

What I'm trying to do is give Mexico the choice between 2 dissent or cores on Central America, occuring at January 8th, 1936.