Showcase theme install error. Broken;stylesheet missing?

I am a new member here. This is my first installation from here and I got error..

I am trying to install the showcase theme in latest WP installed site. I downloaded it from here and uploaded showcase-theme-1.4.zip (first extracted the zip, I downloaded from here as per your installation guide).

I uploaded it from the theme upload section inside the wp admin dashboard.

And when I activate it , I am getting the following error.

"The active theme is broken. Reverting to the default theme."

The following theme is installed but incomplete. Themes must have a stylesheet and a template.

Name Description

wp-showcase-1.4 Stylesheet is missing.

Please tell me how can I use this theme in my wp site.

Thanks and regards
Sunu