I am trying to start with phonegap and cordova. 

I follow step of <http://phonegap.com/install/> , but at command `$ phonegap run android` in command prompt I get following error: `Command line failed with exit code 8`

My cordova in store is at `C:\Users\MAC\.cordova\lib\android\cordova\3.4.0\bin\lib` and WinAnt is at `C:\Users\MAC\.cordova\lib\android\cordova\3.4.0\bin\lib\WinAnt`.