I am just a Statistics teacher who is trying to use an applet which was on the CD-ROM which accompanied the textbook. (The previous two years, this applet opened with no problem.) The file from the CD-ROM disk is PopSampleApplet.class. When I click to open it, I get this message: The Java class file "PopSampleApplet.class" could not be launched. What should my next step be? ------ iMac (August 2007) Mac OS 10.8.4. <according to 'Java Control Panel', my Java is up to date> Elementary Statistics 11th ed Technology Update, by Mario Triola (2012).