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

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

i got it working by downloading the app