title: Android Studio doesn't recognize my device
body: <p>Here is the problem. I want to run my Android Studio apps on my device (Samsung Galaxy Ace 2). But nothing works for me. Tell me what I've missed:</p>
  
  <p>1) USB debugging is on</p>
  
  <p>2) ADB driver is installed (in device manager i can see Android Composite ADB Interface)</p>
  
  <p>3) ADB device list is still clear, even if i reset server(adb kill-server, adb start-server, adb devices - list of devices is clear)</p>
  
  <p>4) in google usb driver directory, in android_winusb.inf file I added my device identificators</p>
  
  <p>5) Android device manager still cannot connect to my device, showing this error when I reset it: "adb connection error an existing connection was forcibly closed by the remote host"</p>
  
  <p>So I will be glad to hear any advices. Hope you'll help me</p>