flex&webservice

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="wsBlogAggr.getMostPopularPosts.send()">
<mx:WebService id="wsBlogAggr" wsdl="http:weblogs.macromedia.com/mxna/webservices/mxna2.cfc?wsdl" useProxy="false">
<mx:operation name="getMostPopularPosts">
<mx:request xmlns="">
<daysBack>
30
</daysBack>
<limit>
{cbxNumPosts.value}
</limit>
</mx:request>

</mx:operation>
</mx:WebService>
<mx:Panel x="10" y="10" width="475" height="400" layout="absolute" title="Most Popular Posts">
<mx:ComboBox x="30" y="25" id="cbxNumPosts" change="wsBlogAggr.getMostPopularPosts.send()">
<mx:Object label="top 5" data="5"/>
<mx:Object label="top 10" data="10"/>
<mx:Object label="top 15" data="15"/>
</mx:ComboBox>
<mx:DataGrid x="30" y="75" id="dgTopPosts" width="400" dataProvider="{wsBlogAggr.getMostPopularPosts.lastResult}">
<mx:columns>
<mx:DataGridColumn headerText="Top Posts" dataField="postTitle"/>
<mx:DataGridColumn headerText="Clicks" dataField="clicks" width="75"/>
</mx:columns>

</mx:DataGrid>
<mx:LinkButton x="30" y="250" label="Select an item and click here for full post"/>

</mx:Panel>

</mx:Application>