Popup event details IE problem!

First problem: Since the update, I lost all my calendar content!
How can I recover all the informations?

Second problem: Popup with the event details doesn’t show in IE9

Here’s my website link (in french)
http://www.montorignal.com/

Thx for help… my boss is not happy with this issue! :-(((

http://wordpress.org/extend/plugins/ajax-event-calendar/