[2013-02-13 12:51:21 - DeviceMonitor] Adb connection Error:An existing
connection was forcibly closed by the remote host [2013- 02-13
12:51:22 - DeviceMonitor] Connection attempts: 1
You need to restart your ADB Connection. Open Command prompt(for windows)
/sdk/platform-tools> adb -kill server
Then Start adb server again
/sdk/platform-tools> adb -start server
Now talking about could not find a compatible AVD
Check your app compatible android version and create a virtual device accordingly or
1.Right click on project in project explorer in eclipse .
2.Go to Run -> Run Configurations -> Target Tab
Then choose Radio button
Always prompt to pick device .
Apply settings and you will be asked next time to choose the device.