problem in hide image control in datalist

hi according to this thread

http://www.aspforums.net/Threads/370912/Hide-the-Image-Control-in-DataList-if-image-does-not-exist-in-DataBase/

i thought that it solved my problem but when i test it again i found that it didn't work correctly

it didn't show div

 if there was image or there wasn't image in database  it didn't show div

 i want it doesn't  show div if there wasn't any image in database

thanks