Foren / Cotonti / Extensions / Support / CKEditor Issues

I'm replying to an older post here, but i'm having the exact same problem with Siena..

As the topic-starter already described, i've transferred my Cotonti site from my localhost (where it works fine with CKEditor) to a public server.
Everything works fine including jQuery sliders, menu's etc, except for the CKEditor that just shows up as a blank text area field..

Any idea's?

Update: Did about 5 clean installs with freshly downloaded Cotonti package, Markitup works but CKEditor is not even showing up..