I have installed the AppleTV app and synched it up my desktop account using the Activation Code. I get a message indicating that I have successfully activated. The TV screen then displays the photo directory from my desktop (see pic). When I try to launch a picture it appears that it's going to load but I then I get a small red error symbol in the bottom left corner (see pic) of the TV screen. I have tried a number of times and it keeps telling me to re-sync with a new activation code. Has anyone experienced this? I can successfully screen mirror using my iPhone Dropbox app, but I would prefer to use the AppleTV App.
I am having the same problem. I see my files but the app won't actually OPEN the images or other files - I just get a black screen with a small red icon in the bottom left corner. Very frustrating! I was hoping to be able to view a powerpoint presentation on my large format TV prior to the event.