OK button in a dialog popup not working in flex - actionscript-3

Question

I am new to learning flex and I have this application which opens up a popup displays some checkbox values and the once the user clicks the OK button populates an array and then closes. But in my code, when I click the OK button nothing happens.
private function closeDialog(event : CloseEvent) : void {
PopUpManager.removePopUp(this); // close this dialog
}
private function onClickOK (event : CloseEvent) : void {
var values:ArrayCollection = new ArrayCollection();
for (i = 0; i < table.length; i++) {
var row:Array = table.getItemAt(i);
if (row["selected"]) {
var valueRow:Array = new Array();
arrayRow["colA"] = row["colA"];
values.addItem(valueRow);
}
}
page.model["choosenvalues"] = values;
closeDialog(event);
}
And here is the flex code
<mx:VBox paddingLeft="10" paddingRight="10">
<mx:HBox width="100%" height="100%">
<mx:Spacer width="2%" />
<mp:Table id="selectTable" dataProvider="{table}" title="" height="350">
<mp:columns>
<mx:AdvancedDataGridColumn dataField="selected" headerText=" " editable="true" textAlign="center" minWidth="36" width="36" paddingLeft="0" paddingRight="0">
<mx:itemRenderer>
<mx:Component>
<mx:CheckBox width="18" click="{data.selected = !data.selected}" label="" paddingLeft="0" paddingRight="0"/>
</mx:Component>
</mx:itemRenderer>
</mx:AdvancedDataGridColumn>
<mx:AdvancedDataGridColumn headerText="Column A" minWidth="240" dataField="colA"/>
</mp:columns>
</mp:Table>
</mx:HBox>
<mx:HBox width="100%">
<mx:Spacer width="85%" />
<mx:Button label="OK" click="onClickOK(null)" enabled="true"/>
<mx:Button label="Cancel" click="closeDialog(null)"/>
</mx:HBox>
</mx:VBox>

Answer 1

Try removing the event parameters from methods, since you don't use them. Anyway, the onclick handler should accept MouseEvent or just Event, not CloseEvent.
private function closeDialog() : void {
PopUpManager.removePopUp(this); // close this dialog
}
private function onClickOK () : void {
...
closeDialog();
}
MXML:
<mx:Button label="OK" click="onClickOK()" enabled="true"/>
<mx:Button label="Cancel" click="closeDialog()"/>
Note: parameterless event handlers are possible with MXML, since if you try it with AS, you'll get warnings.