I've done a search and found a few threads which suggest the Harmony should automatically turn off the ATV. However, its just not happening for me. The activity is setup so that devices should be turned off at the end of the activity, but I think the problem is that the remote doesn't know how to turn it off. I've tried learning the command for turning it off manually, but the software doesn't seem to like that either, possibly because it misinterprets me holding down a button for 5 seconds as being a faulty IR signal. Any ideas on how to get round this problem please? Thanks!