clear cahce flexviewer browsing

hi,

I create flexviewer application and add layer kml in config file and everyday i will update my latest.kmz file.
<layer type="kml" label="Latest Point" url="http://abcdef.com/flex/point/kml/latest.kmz" visible="true"/>
My problem is my flexviewer application still display previous latest.kmz. I've clear history \ cache my web browsing but it's still not work.

Thank