Hey! I'm a starter fr android app dev..just installed the windowbuilder plugin fr eclipse juno. I created an empty project, and tried to open d mainactivity.xml using windowbuilder editor, it throws an exception.. org.eclipse.e4.xwt.XWTException: Type RelativeLayout is not found. Type RelativeLayout not found?? how can i solve dis prob?? Ny suggestions? I've attached a report, incl d screenshots...Plz Help!