How do I get my Googles Analytics+ plugin to work?

This is the message I got from Google:

Status: Tracking Not Installed
Last checked: Feb 10, 2014 5:19:46 AM PST
The Google Analytics tracking code has not been detected on your website's home page. For Analytics to function, you or your web administrator must add the code to each page of your website.

I did place the correct code in the proper place under setting/Google Analytics. I have double checked to be sure that the code was correct.