Comenzando con Android - Mensaje error Emulator

[GUILLHERMOSOFT]

Hola, he creado nuevamente el proyecto y ahora se imprime lo siguiente:


[2011-05-16 23:17:58 - practicando] Android Launch!
[2011-05-16 23:17:58 - practicando] adb is running normally.
[2011-05-16 23:17:58 - practicando] Performing practicandoapp.guillermo.actividad activity launch
[2011-05-16 23:17:58 - practicando] Automatic Target Mode: launching new emulator with compatible AVD 'Prueba'
[2011-05-16 23:17:58 - practicando] Launching a new emulator with Virtual Device 'Prueba'
[2011-05-16 23:17:59 - practicando] New emulator found: emulator-5554
[2011-05-16 23:17:59 - practicando] Waiting for HOME ('android.process.acore') to be launched...
[2011-05-16 23:20:24 - practicando] WARNING: Application does not specify an API level requirement!
[2011-05-16 23:20:24 - practicando] Device API version is 12 (Android 3.1)
[2011-05-16 23:20:24 - practicando] HOME is up on device 'emulator-5554'
[2011-05-16 23:20:24 - practicando] Uploading practicando.apk onto device 'emulator-5554'
[2011-05-16 23:20:24 - practicando] Installing practicando.apk...
[2011-05-16 23:22:28 - practicando] Failed to install practicando.apk on device 'emulator-5554!
[2011-05-16 23:22:28 - practicando] (null)
[2011-05-16 23:22:28 - practicando] Failed to install practicando.apk on device 'emulator-5554': Se ha anulado una conexión establecida por el software en su equipo host.
[2011-05-16 23:22:28 - practicando] com.android.ddmlib.InstallException: Se ha anulado una conexión establecida por el software en su equipo host.
[2011-05-16 23:22:28 - practicando] Launch canceled!