[flexcoders] Help with error #1119

[dmschenk1]

I have a 1119 error that is giving me fits and I'm sure its probably
something simple but I've been trying for days with no luck.

Would someone please take a look at this code and help me figure out
what I'm doing wrong here?
The problem is in "dp.length" at line 18 of the "AverageFunction" and
also in line 29 of the "TotalFunction" but being new to programing I
don't really understand how to interpolate the error. 

-------------------------
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml";
        xmlns:scripts="scripts.*" 
        initialize="dp.send()" >

<mx:Script>
<![CDATA[
    import mx.collections.ArrayCollection;
        import mx.rpc.events.ResultEvent;

        [Bindable]
        private var ciData:ArrayCollection = new ArrayCollection();             
        
        private function ciResult(event:ResultEvent):void{
                ciData = event.result.Credit.Creditor;
        }
 
        public function AverageFunction(col:DataGridColumn):String {
                var n:int = dp.length;
                var avg:Number = 0;
                for (var i:int = 0; i < n; i++)
                {
                        avg += dp[i][col.dataField];
                }
                avg /= n;
                return "Avg: " + avg.toFixed(1) +"%";
        }
        
        public function TotalFunction(col:DataGridColumn):String {
                var t:int = dp.length;
                var tot:Number = 0;
                for (var i:int = 0; i < t; i++)
                {
                        tot += dp[i][col.dataField];
                }
                return  "Total: $" +tot.toFixed(2);
         } 

]]>
</mx:Script>

<mx:HTTPService id="dp" url="data/creditInfo.xml"
result="ciResult(event)" />


<scripts:FooterDataGrid id="dGrid" initialize="dGrid.dataProvider =
dp" width="550"                                                 paddingTop="0" 
paddingBottom="0"
verticalAlign="middle">

<scripts:columns>

<scripts:FooterDataGridColumn headerText="" dataField="creditorName" >

<mx:DataGridColumn headerText="Name" dataField="creditorName"
editable="true"/>

</scripts:FooterDataGridColumn>

<scripts:FooterDataGridColumn headerText="Interest Rate"
dataField="interestRate" >

<mx:DataGridColumn labelFunction="AverageFunction" 
dataField="interestRate" editable="true" />

</scripts:FooterDataGridColumn>

<scripts:FooterDataGridColumn headerText="Balacnce"
dataField="balanceOwed" >

<mx:DataGridColumn labelFunction="TotalFunction"
dataField="balanceOwed" editable="true" />

</scripts:FooterDataGridColumn>

<scripts:FooterDataGridColumn headerText="Monthly Payment"
dataField="monthlyPayment" >

<mx:DataGridColumn labelFunction="TotalFunction"
dataField="monthlyPayment" editable="true" />
                        </scripts:FooterDataGridColumn>
                </scripts:columns> 
                </scripts:FooterDataGrid>

</mx:Application>
--------------------------------

Thanks
Dave