What version of mojoportal? In the new 2.2.6.7 version is included a new version of fckeditor. Did you upload /ClientScript/fckeditor263?
If so, did you try to keep your old Web.config?
Whenever I add a new version of fckeditor I change Web.config to the new path:
<add key="FCKeditor:BasePath" value="~/ClientScript/fckeditor263/" />
<add key="FileBrowserRelativePath" value="~/ClientScript/fckeditor263/editor/filemanager/browser/default/browser.html" />
<add key="ImageBrowserRelativePath" value="~/ClientScript/fckeditor263/editor/filemanager/browser/default/browser.html" />
So either you didn't get the new web.config settings or you didn't get the new version of FCKeditor.
Hope it helps,
Joe