DateField one month off

Question

Has anyone else had any problems with the date of the datefield?
When I set the selectedDate property the month displayed is actually one higher then the month I give it.
However, when using the date picker it does show the date I selected...
I tried different ways of setting the date, but to no avail...
My code:
startDate = new Date();
startDate.date = 15;
startDate.month = 09;
startDate.fullYear = 2009;
<mx:DateField editable="true" formatString="DD/MM/YYYY" selectedDate="{startDate}"/>
output: 15/10/2009
Thanks
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Answer 1

Blame Player.
Dates are usually a lot easier if you just create some static constants for the Month names:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx">
    <fx:Script>
        <![CDATA[
            [Bindable]
            private var startDate:Date;
            private const JAN:uint = 0;
            private const FEB:uint = 1;
            private const MAR:uint = 2;
            private const APR:uint = 3;
            private const MAY:uint = 4;
            private const JUN:uint = 5;
            private const JUL:uint = 6;
            private const AUG:uint = 7;
            private const SEP:uint = 8;
            private const OCT:uint = 9;
            private const NOV:uint = 10;
            private const DEC:uint = 11;
            private function init():void {
                startDate = new Date(2009, SEP, 15);
                callLater(df.open);
        ]]>
    </fx:Script>
    <s:HGroup>
        <mx:DateField id="df" editable="true" formatString="DD/MM/YYYY" selectedDate="{startDate}"/>
        <s:Button click="init();" />
    </s:HGroup>
</s:Application>