a break in "sliding panel" issues (coda slider)

Hi There,

I am working on this site

http://threedash.com/test/

and as you can see when you click on "videos"
the panel doesn't slide sideways, but it scrolls down.

please view site to understand.

this problems can be fixed here

.panel { border: 1px solid #000; padding: 20px; margin-right: 20px; height: 400px; width: 820px; background: url(img/darkbg.png) repeat; }

but i want the spacing on both sides.

help please.

_threedash

but