how to add new jqueryMobile from themeroller???

how to add new jqueryMobile from themeroller???

I've made a new theme for my phonegap+jQueryMobile app with themeroller for my jquerMobile version 1.2.1

I've downloaded the zip , and I've followed the instructions that are:

Add theme folder to your project and then include this  before jquery files 

<link rel="stylesheet" href="themes/mytheme.min.css" />

But It doesn't work at all...

How can I get it????

Thanks!