Media List on AutoRun

Hey All. I have 4 HD223 synchronized, with the videos inside a Media List. The problem comes in when the first video ends. Instead of moving to the next one on the list, it loops the first video. The tech support team helped me create the presentation, and they added Play Next & Previous buttons, so at the moment we can change the video that is playing, but we were looking for the videos to play automatically without the need for someone changing content every 2/3 minutes. Any ideas on how can I make it so after the first video ends, the second one plays, then the third, etc? Thanks