Any Spotify gurus?

Maybe the OT was the wrong place for this, so I'll try again....

I had a lightning strike and had just about everything electronic in my home fried. I recently purchased two replacement AV Receivers - a yamaha RXV-677 and a yamaha RXV-477. Both support spotify. The major differences are that one is 7 channels and one is 5 channels, and the 677 has built in wifi whereas the 477 is hard wired to my router.
My problem is that Spotify connect only recognizes the 677. I've tried unplugging the 677 to see if the 477 would show up, and no luck. For the record everything works great and exactly as advertised between the spotify app and the 677 receiver. But I'd much prefer to use the 477 for spotify playback.
I realize that I can only play back on one device at a time, but I'd like the option to choose which device. Other than an iPhone and an iPad both with spotify apps on them, these are the only devices on the network.
For the record I'm new to spotify and have not paid for the premium service yet. I have every intention on doing so if I can get this resolved. I'd really like to stream to the 477 receiver.

The yamaha app that controls both receivers works just fine. It asks me which one I'd like to control. And pandora works just fine on the one I'd like to play spotify on...so I know it's on the network.