projector, apple tv, sonos, airport express

Hi everyone!

I'm having trouble setting up the 4 components in the title. I currently have an apple tv, a sonos play 5, a projector with hdmi output (Brookstone pocket projector) and I recently purchased an Airport Express. I used the instructions on the Sonos website to connect the Apple TV to the Sonos via the Airport Express. But, it's not working... at all... for anything.... dead silence.

Any advice? Anyone have a similar setup?

Thanks in advance.