The content details of that post are for a banner sidebox, and are not applicable to the ezpages sidebox. Make the clone by duplicating the module and template file with "2" added to the name in all relevant places including inside the file code, adjust for the different page ids, and you should be good to go.

Another way you could handle it would be to get the Blank Sidebox mod from Free Addons, adjust its filenames to your purposes, and copy the functional ez-pages code into those files and adjust.