How to install on nexus 7

How exactly do I install the jmonkeyengine app on a nexus 7. I tried putting it in the download folder but it doesnt show up. I also tried running it from the sdk bu it says waiting for device to be ready.

Do you have the appropriate drivers for dev mode with a nexus 7?
If those drivers are not installed the device can’t be seen by the android sdk.
try this maybe
http://blogs.remobjects.com/blogs/mh/2012/07/30/p4657

Vista wont install the usb driver from asus for unknown device.

i got it working by downloading the app