I used Java 1.4 for the applets. But it seems that I'm the only one who has installed it. I'm going to rebuild these challenges so they don't need Java 1.4 (but this isn't that new...).
now the two applets should be visible for you too. I changed them so they don't need Java 1.4. (You have to reload the applet explicitly) Please post weather it works for you or not.