From your files, I think you're using the folder of an old version of C2.
The html5 folder is missing some files, and should be containing "jquery-1.6.3.js", not "jquery1.4.4.min.js".
Also your behaviors folder contains only 2 folders (2 custom one you probably added yourself).
There you should find :
<img src="http://dl.dropbox.com/u/36472942/construct/forumhelp/R59folder.png" border="0" />
From your screenshot I take it that you use windows vista or 7.
I don't, so I can't guide you more into finding what's wrong.
My guess is that you have several versions of C2 installed and that you're operating in an erroneous version's folder.