The problem may be the Flash plugin version on your IE. If you go to the main RIA homepage (
http://ria.clear.msu.edu) and right click on the recorder on the left hand side, you'll see a 'About Flash player 9' or 'About Flash Player 10' or something like that. If it says '9' then audio dropboxes v2 will not work, since they need Flash version 10 or later. In that case you may want to update the Flash player. Thats the only thing I can think of right now.