I just want share few things which i learnt when developing an application.
Whenever you want to dynamically load flex components from server using HttpService,following points will be helpful.
1. If you to load your data in chart/datagrid (i.e data is not hierarchical ) then you can use following HttpService
The resultformat must be E4X with proper result handlers. example
<mx:HTTPService id="srv" resultFormat="E4X" url="http://localhost:8080/SampleWebApp/test.jsp"/>
2. If you need to load your data in TREE (i.e. data is hierarchical) then the resultFormat must be xml
Hope this will help you ppl in designing your applications