Forum Cannot insert or edit image
 

When I'm creating new articles in the CMS or in the forums, I can not add new images via "Insert Image" icon into the article or in an discussion thread.

For example in the article editor, I click on the icon "Insert Image" it quickly brings up a black section - but then does NOTHING... I can not figure how to make this work. Same effect when trying to double click on the pencil icon to edit he image (full size, medium, ...)

Same thing happens in IE8, and FF3.5...