Android Emulator is not working

Application Type:Mobile,Titanium SDK version:3.2.1 GA,Platform:Android 2.3.3,Device:Emulator Windows 7 I am working with alloy,Android Emulator is not working its saying

events.js:72
        throw er; // Unhandled 'error' event
              ^
Error: spawn OK
    at errnoException (child_process.js:980:11)
    at ChildProcess._handle.onexit (child_process.js:771:34)
[ERROR] Application Installer abnormal process termination. Process exit value was 8