The upload image via CKFinder can't display in preview

I install the CKEditor in Drupal, and then install the CKFinder under it, I follow with the guide make change, such as modify the code, and so on ...
After install finished, I use CKFinder in CKEditor's interface, the image upload success, and the link of uploaded image subimit to "image info/URL" automatically. but the image can't display in "image info/Preview".
I straight press the button of "OK", there is nothing happen in the textarea, but i use the source mode, I can see the code of image.

Please tell what is the problem, and how can i do ?

thank you very much.