My sidebar under footer !

As you can see here : http://parisstockholm.free.fr, on the first page, my sidebar is just under the footer… On the others, no matter, it’s on the left.
It worked until I’ve tried to add links on my page. I’ve deleted them after, and now, I just don’t know what to do to replace my sidebar.
Can you help ?

Thanks a lot.
Johan.