Forum:Collapsing table help

Me and the other admin on the Kuroshitsuji wiki are trying to figure out how to make a collapsible table for the past poll results. We both tried to test collapsible tables on the main page's talk page by copy and pasting the coding from here and here. We haven't edited the codes at all, but they don't work. What are we doing wrong? SereneChaos 16:44, August 16, 2011 (UTC)