Creating model in specific module

Hi all,

 I am trying to create a customer model in admin module. I tried this
output of this is 
But there in nothing in my modules/admin/models folder.

Even I tried - 
and got the same.   

Anybody please help me.

Try to create it using yiic tool in your application’s /protected directory.

I was trying above using yiic tool, but I had forgotten to include module in config/main.php like -

modules = array('admin'),

now its working perfectly fine!