Iframe Code does not work. It delete it.

Hi,

im using this editor because it´s on Immobilinescout24.de.

The Problem is now that i cant put an iframe code into it. If i save it, the editor delete this code.

and the Youtube Video too:

<iframe width="560" height="349" src="http://www.youtube.com/embed/fokqvClL0dE" frameborder="0" allowfullscreen></iframe>

How can i do it now?



Notes: The Platform is using Version
2.3.1
Build 1062

Im using firefox 5.0