When you hit run, you get following message:
[2009-04-25 01:00:24 - Emulator] emulator: ERROR: unknown virtual device name: ‘my_avd’
[2009-04-25 01:00:24 - Emulator] emulator: could not find virtual device named ‘my_avd’
Solution:
Create a system variable called ANDROID_SDK_HOME and point it to users folder. Ex: C\Users\UserName\