[flexcoders] whole xml response is diaplying as tooltip when i place cursor on data cell

[Ramabhadra Reddy]

<mx:HTTPService id="getXMLResponse" method="GET" showBusyCursor="true"
                useProxy="false" resultFormat="e4x" concurrency="last"
                result="handleResponse(event)" requestTimeout="30"
                fault="parentApplication.showGenericError()" />
resultFormat="e4x" is causing the issue.
whole xml is displaying as tooltip when i display xml response over data grid. 
my requirement is need to display tooltip as corresponding data value. 
How can i display only corresponding cell data value as tooltip instead of 
whole xml response.
Any help is appriated.