First time poster. Hope I'm in the right place! I'm a complete novice at these things so apologies if I get the wrong terminology! Recently bought a Panasonic TX-49DX600B TV. I've connected it via ARC to a Panasonic SA-BTT350. It works really well. The iPlayer app on the TV plays through the amplifier no issues. The Amazon Instant Video app on the other hand doesn't. It correctly mutes the speakers on the TV, but nothing comes out of the amplifier. Any ideas what I can try?