problem with '/' in the url

Hi,

i create a page with this url: http://some/addNew, an FCKeditor works great. But the url: http://some/addNew/ don't display the editor. It's a problem, because when i edit the new, i use this url: http://some/editNew/id/3. And in this case the FCKeditor don't appear.

What can i do?

Thanks and sorry for my poor English