picture cannot be displayed in the editor

When I open a page containing pictures using the editor, none of the pictures can be displayed in the editor. I right-click on the picture and select image properties, the Image Properties dialog opens. In the Image Info tab, I notice that the URL is correct, but in Preview, the picture still cannot be displayed. I right-click on the image and select View Image, I go into another page with the url: http://localhost/fckeditor/editor/dialog/pics/1.jpg . Where pics/1.jpg is the picture I want to be displayed. The correct path should be http://localhost/pics/1.jpg. The editor tries to find the picture in /fckeditor/editor/diaglog/pics/1.jpg, which does not exist. The problem might be the editor think the root is /fckeditor/editor/dialog/ .How to fix this problem? It's not convenient if the user cannot view the picture in the editor.However, the picture can be displayed in the page.