Android: No geometry appears?

Hi!

I'm working with Google Project Tango, and all I'm doing is testing the tracking. But I can't get anything to show up in the scene!

Everything is updated and working properly. I have no code in the project, I've just made a really simple environment with a plane as the ground and a cube and sphere just hangin around. I have the Tango Manager and Tango Delta Camera in my Hierarchy. That's all I've done. The APK installs on the device just fine, and opens. Tracking looks like it's working, but there isn't any geometry appearing for me to really see.

I've done everything I can think of. I've reinstalled everything, I've re-built the project, re-read Google's guide, everything, but I can't find the issue.

I've built projects for other Android devices just fine with no problems like this, so I have no idea what's going on.

What might I be missing? Thanks for your help!