title: unity3d couldn't find Android device
body: <p>I am doing a unity3d gaming application for android. I have installed unity3d in windows-7. I am creating a sample application. When I execute(showing in screenshot below) my application from unity3d I am getting "couldn't find Android device" error. But I have already connected with the android device. If I execute my application from MAC OS, I can execute it with android device. What may be the problem. </p>
  
  <p><img src="https://i.stack.imgur.com/QRSnP.jpg" alt="Unity3d Error"></p>
  
  <p>Can someone help me how to fix this?</p>