It can take a while, once you get FTP to work, before an image starts to appear. Then the playback will be even further delayed before it works "properly". Again, image size is critical and a full 5MP image will result in inconsistent playback. Keep the file sizes or frequency of upload down. I found the settings I'm using by trial and error over about a week of experimenting, changing size and time interval once daily until it remained consistent during playback.