images disappear

I'm struggling with displaying uploaded images. I copied a sample application that performed that task-- all was working fine-- the images appeared in my various views. Then I changed the name of the application, and now all it shows me is the function code: <img src='http://creator.zoho.com/DownloadFile.do?filepath=/1237954737597_Photo_33.jpg&sharedBy=burningoperadb' title='Sample Images' alt='Display Uploaded Images in Zoho Creator' width='150' height='150'/>

What have I done wrong?