http://imigrar.com/photo/data/502/thumbs/DSC00028.jpg
Your missing what I am saying here. Look at the link. Is your data path under photopost? Does the file exist where it is looking for it. If I go to the url the program is looking for the file which is what your saying is your data path and permissions are right a file should appear. It does not.
PM me your admin login to see what you have your data path stuff set as