When I try to play yahoo crosswords, I get this error: Error: Permission denied for <http://ad.doubleclick.net> to call method Location.toString. Any idea how to fix it?

This is the full text of the error: exception: Permission denied: http://presence.games.yahoo.com/yog/. java.lang.SecurityException: Permission denied: http://presence.games.yahoo.com/yog/ at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Exception: java.lang.SecurityException: Permission denied: http://presence.games.yahoo.com/yog/ exception: Permission denied: http://games.yahoo.com/litsoft/crossword/. java.lang.SecurityException: Permission denied: http://games.yahoo.com/litsoft/crossword/ at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Exception: java.lang.SecurityException: Permission denied: http://games.yahoo.com/litsoft/crossword/