Hi Gaurav, I checked for the file (flex-sdk-description.xml) and i couldn't find it in my web app.
I have the following Structure in my web app.. /WEB-INF/ -classes -flex lib -- Common JARS libs .swc files locale en_US *_rb.swc data-management-config.xml flash-unicode-table.xml flex-config.xml flex-webtier-config.xml messaging-config.xml mxml-manifest.xml proxy-config.xml remoting-config.xml services-config.xml -lib As i am able to compile the .swf files from my FlexBuilder ( I have set the default SDK to 3.0.0 in my FlexBuilder) I copied the flex-sdk-description.xml to /WEB-INF/flex/ and retsrated the tomcat but still getting the same error: ( unable to load the .swc file) unable to load SWC rpc.swc It is clear that it is trying to use Flex2 SDK ..But from where it is getting this info i am not sure.. How can i configure so that it uses Flex 3. Thanks Mars