I have just started Android programming so downloaded Eclipse and got started.
Created my first project following tutorial from here: http://developer.android.com/training/basics/firstapp/creating-project.html#CommandLine
And when I was on next lesson to run that application from here: http://developer.android.com/training/basics/firstapp/running-app.html
I did as they said. Connected my device via USB, enabled USB debugging too, but when I clicked Run on eclipse, got the above error.

What have I done wrong?