"Data binding will not be able to detect assignments" alert - but no runtime error

Question

I have a class that is instantiated as hhgrab, it has an
array declared like:
[Bindable]
public var resultData:ArrayCollection = new
ArrayCollection();
In my MXML file, I bind that array to a datagrid like:
<mx:DataGrid x="19" y="283" width="383"
dataProvider="{hhgrab.resultData}">
But I am given a warning that says "Data binding will not be
able to detect assignments to hhgrab"
I googled this and saw that this alert is thrown when a
variable was not declared as bindable, but mine is. Could this be a
Flex Builder 3 bug?
Thanks..

Answer 1

I made hhgrab bindable:
package components
public class MyAC
import mx.collections.ArrayCollection;
[Bindable]
public var resultData:ArrayCollection = new
ArrayCollection();
public function MyAC():void {
resultData = ArrayCollection([
{Month:"January", Profit:2000, Expenses:1500, Amount:450},
{Month:"February", Profit:1000, Expenses:200, Amount:600},
{Month:"March", Profit:1500, Expenses:500, Amount:300},
{Month:"April", Profit:500, Expenses:300, Amount:500},
{Month:"May", Profit:1000, Expenses:450, Amount:250},
{Month:"June", Profit:2000, Expenses:500, Amount:700}
<?xml version="1.0"?>
<!-- charts/BasicLine.mxml -->
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml">
<mx:Script><![CDATA[
import components.MyAC;
[Bindable]
private var hhgrab:MyAC = new MyAC();
]]></mx:Script>
<mx:DataGrid x="19" y="283" width="383"
dataProvider="{hhgrab.resultData}"/>
</mx:Application>