Emulator failed to start in a timely manner in [hello world program]

hello,

Application type: mobile Titanium SDK: 3.2.3.GA Platform & version: windows 7 Device: Android emulator

I just make hello world program

i follow this instruction :: http://docs.appcelerator.com/titanium/latest/#!/guide/Quick_Start

the program run successfully on the web browser

but when i run on the Android emulator, this error display::

[ERROR] : Emulator failed to start in a timely manner The current timeout is set to 120000 ms [ERROR] Application Installer abnormal process termination. Process exit value was 1

How can i solve it?

Thanks