Then it's not the fault I thought it was. When you browse directly to that image by placing the cms/imagesupload/cms_files/column(2).jpg after your domain adddress
(i.e. http://www.yourdomain.com/cms/imagesupload/cms_files/column(2).jpg) do you see the image?
It is likely that the Editor is somehow interpreting and entering the wrong path.
Could you post a link to a page that should be containing the image, so that we can work on the paths issue?