>>>I can get all JPG files into cursor, but I'm afraid it may be slow. But since Filer and ADIR both returns weird results I don't have a choice. I also have to scratch all my code and start fresh, which is very upsetting, since I already spent few days in total working on this program... :(

I suggest you take this piece of code that grabs the filenames and make it a separate module. It can be more easily repaird later. Do not blend it with some other code - such as the code that displays the files.