This usual error "Failed to allocate memory: 1455" would be caused by Virtual Memory alocation. So, as I did, just follow the indications by Calvin in this post: http://forums.techarena.in/operating-systems/1263684.htm#post5500858.
After resolving in this way the allocation of Virtual Memory for the root C disk, you should read in the console of Eclipse, the following:
[2011-11-27 12:33:06 - Videotutorial1] ------------------------------
[2011-11-27 12:33:06 - Videotutorial1] Android Launch!
[2011-11-27 12:33:06 - Videotutorial1] adb is running normally.
[2011-11-27 12:33:06 - Videotutorial1] Performing com.videotutoriales.videotutorial1.Videotutorial1Activity activity launch
[2011-11-27 12:33:06 - Videotutorial1] Automatic Target Mode: Preferred AVD 'VtAVD' is not available. Launching new emulator.
[2011-11-27 12:33:06 - Videotutorial1] Launching a new emulator with Virtual Device 'VtAVD'
[2011-11-27 12:33:39 - Emulator] emulator: emulator window was out of view and was recentered
[2011-11-27 12:33:39 - Emulator]
[2011-11-27 12:33:45 - Videotutorial1] New emulator found: emulator-5554
[2011-11-27 12:33:45 - Videotutorial1] Waiting for HOME ('android.process.acore') to be launched...
[2011-11-27 12:38:19 - Videotutorial1] HOME is up on device 'emulator-5554'
[2011-11-27 12:38:19 - Videotutorial1] Uploading Videotutorial1.apk onto device 'emulator-5554'
[2011-11-27 12:38:20 - Videotutorial1] Installing Videotutorial1.apk...
[2011-11-27 12:40:52 - Videotutorial1] Success!
[2011-11-27 12:40:53 - Videotutorial1] Starting activity com.videotutoriales.videotutorial1.Videotutorial1Activity on device emulator-5554
[2011-11-27 12:41:18 - Videotutorial1] Attempting to connect debugger to 'com.videotutoriales.videotutorial1' on port 8628
[2011-11-27 12:33:06 - Videotutorial1] ------------------------------
[2011-11-27 12:33:06 - Videotutorial1] Android Launch!
[2011-11-27 12:33:06 - Videotutorial1] adb is running normally.
[2011-11-27 12:33:06 - Videotutorial1] Performing com.videotutoriales.videotutorial1.Videotutorial1Activity activity launch
[2011-11-27 12:33:06 - Videotutorial1] Automatic Target Mode: Preferred AVD 'VtAVD' is not available. Launching new emulator.
[2011-11-27 12:33:06 - Videotutorial1] Launching a new emulator with Virtual Device 'VtAVD'
[2011-11-27 12:33:39 - Emulator] emulator: emulator window was out of view and was recentered
[2011-11-27 12:33:39 - Emulator]
[2011-11-27 12:33:45 - Videotutorial1] New emulator found: emulator-5554
[2011-11-27 12:33:45 - Videotutorial1] Waiting for HOME ('android.process.acore') to be launched...
[2011-11-27 12:38:19 - Videotutorial1] HOME is up on device 'emulator-5554'
[2011-11-27 12:38:19 - Videotutorial1] Uploading Videotutorial1.apk onto device 'emulator-5554'
[2011-11-27 12:38:20 - Videotutorial1] Installing Videotutorial1.apk...
[2011-11-27 12:40:52 - Videotutorial1] Success!
[2011-11-27 12:40:53 - Videotutorial1] Starting activity com.videotutoriales.videotutorial1.Videotutorial1Activity on device emulator-5554
[2011-11-27 12:41:18 - Videotutorial1] Attempting to connect debugger to 'com.videotutoriales.videotutorial1' on port 8628