looking at your macro, you might try a shorter delay than 5 sec. This may not fix your problem, just make the wait time before you can use the remote shorter. When I program a remote, delay lengths are as short as possible to get the correct outcome.
Your Onkyo after the powering on may accept a command within .5 sec or less. No need to have a 5 sec delay when .5 will work. Just a thought, and a pet peeve of mine having unnecessarily long delays.

Make sure remote is set to IR to test. (You may have this set correctly)