ionic build android not working

I'm trying to install ionic in my computer and i did all the steps necessary.i even gave the correct environment variables.but i cant build my ionic app for android.when i type ionic build android in the console nothing happens. NOTE: i'm trying to build a app which already has android platform added.

These are the paths i have given in my environment variable

C:\Program Files\Java\jdk1.7.0_45\bin;
C:\Program Files\adt-bundle-windows-x86_64-20140702\sdk\platform-tools;
C:\Program Files\adt-bundle-windows-x86_64-20140702\sdk\tools;
C:\apache-ant-1.9.4\bin;
C:\Program Files\nodejs;
C:\Program Files\Git\bin;
C:\Users\CRY$TAL\AppData\Roaming\npm

Is it possible that you need to have a path variable for:

C:\Program Files\adt-bundle-windows-x86_64-20140702\sdk\tools\ant

I know on my Mac I had to make sure i have tools/ant/ in my PATH before it would build.