[RESOLVED] could not resolve <mx:AdvancedDataGrid> to a component implimentation

[hjguerin]

im trying to get this facebook application to work but i keep getting this error: could not resolve <mx:AdvancedDataGrid> to a component implimentation

it seems that the namespaces are in order...maybe?

<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009" 
         xmlns:s="library://ns.adobe.com/flex/spark" 
         xmlns:mx="library://ns.adobe.com/flex/halo" width="100%" 
         height="100%" currentState="CONNECTING">



/**
             * Friends details request handler
             */
            protected function onGetFriendsInfo(event:FacebookEvent):void
            {
                userFriends = new ArrayCollection((event.data as GetInfoData).userCollection.source);
            }
            
        ]]>
    </fx:Script>
    
    <s:states>
        <s:State name="CONNECTING"/>
        <s:State name="CONNECTED" />
    </s:states>
    
    <mx:ProgressBar includeIn="CONNECTING" label="Connecting..." 
                    indeterminate="true" labelPlacement="center" 
                    horizontalCenter="0" verticalCenter="0"/>
    
    <s:Label text="Hello {user.first_name}!" horizontalCenter="0" 
             verticalCenter="-100" fontSize="29" includeIn="CONNECTED"/>
    
    <mx:AdvancedDataGrid id="adgFriends" dataProvider="{userFriends}" 
                         designViewDataType="flat" horizontalCenter="0" 
                         verticalCenter="19" includeIn="CONNECTED">
        <mx:columns>
            <mx:AdvancedDataGridColumn headerText="Name" 
                                       dataField="first_name"/>
            <mx:AdvancedDataGridColumn headerText="Last Name" 
                                       dataField="last_name"/>
        </mx:columns>
    </mx:AdvancedDataGrid>
    
    <mx:LinkButton label="Get AIR (desktop) version..." horizontalCenter="0" 
                   verticalCenter="150" color="#ABA5A5" fontWeight="bold" 
                   textDecoration="underline" fontSize="14"
                   click="navigateToURL(new URLRequest('http://www.riaspace.net/'))"/>
    
    
</s:Group>