inline snippet to enable/disable field(s) in a popup - works, but only after field changed

I have some inline JS that enables/disables one field (toggles between "read" and "readonly") based on the value of another field. The fields are both in a popup.

The code works, but only once the popup has come up and I've set/reset the controlling field. I can't get it to initially enable/disable the controlled field. Here is the code, taken from a sample that Zach gave me. It works perfectly elsewhere, but doesn't work initially for my popup.

---------- snip, snip ----------
(function(skuid){

var $ = skuid.$,
$M = skuid.model.map();
$(function(){

var AccountModel = $M.NewAccount,
Account = AccountModel.getFirstRow();

// Register a listener on the Status field.
// When it is changed, we may need to rerender some fields
// to make them read-only.
var listener = new skuid.ui.Field(Account,AccountModel,null,{
fieldId: 'Status__pc',
register: true
});

var fieldsToDisable = ['Death__pc'];

var deathHandleChange = function(newValue){
$.each(AccountModel.registeredLists,function(){
$.each(this.renderedItems,function(){
$.each(this.fields,function(){
if ($.inArray(this.id,fieldsToDisable)!==-1){
if (newValue == 'Deceased') this.mode = 'edit';
else {
this.mode = 'readonly';
}
AccountModel.updateRow(Account,this.id,'',{initiatorId: this._GUID});
this.element.empty();
this.render();
}
});
});
});
};

listener.handleChange = function(newValue){
deathHandleChange(newValue);
};

// Run the handle change initially
deathHandleChange(
AccountModel.getFieldValue(Account,'Status__pc',true)
);

});

})(skuid);
---------- snip, snip ----------