Images broken

I have set up the editor as follows:

Editor:
http://www.mysite.com/ckeditor

Area using the editor:
http://www.mysite.com/administration (here I use to call the js like this ../ckeditor/xx.js)

Images are at:
http://www.mysite.com/App_Themes/Default/images/etc.gif / etc.jpg

When I open the editor, the images path are as follow:
App_Themes/Default/images/etc.gif

Currently I'm running TinyMCE and I have a setting like this:
document_base_url: http://www.mysite.com/
works fine.

I have tried to use config.baseHref with no success.
Any help is much appreciated.