Recently active topics in Intense Debate tagged with snippet

I am trying to add the javascript snippet at my site (doesn't use any standard blog system, it is home-made and hadn't any commenting abilities till now).

When I add it I get an "Opps! (2)" where I put it (below article). Also after I press "Finish" back to the Intense Debate "add javascript snippet" page, it redirects me to "http://intensedebate.com/editacct/0" and displays "Invalid account. Your accountid is invalid.".