WP & G. Analytics Script/Plugin

Hi,

almost 16 hours I’m trying to verify the Google Analytics Script Monitoring for http://www.dimagrirelapancia.org, my website created in wordpress (theme sahifa 2.5) but not success at all!
I have several sites tested, usually a matter of 5 minutes and I did (as usual are many services of google) but this time nothing.

I tried plugin like “Google Analytics for WordPress” and the like that should take care of the integration of the script automatically or via google authorization, but are errors (eg: Unfortunately, an error occurred while connecting to Google, please try again: Re-authenticate with Google)

I copied the script in the head and in the footer manually, either using Edit in WP and FTP
I disabled all plugins and tried
I recreated the account analytics for the site in question more than three times
I tried both with and without the www, either with the / final without.
I gutted the php files in the template
I looked for similar problems in the network in English (i am from italy)

So at the end of the day I have almost done nothing but want to associate my site with Analytics!
Please help me, I attach a screenshot of the plugin installed, I do not know what to invent.

HERE MY INSTALLED PLUGIN: http://www.dimagrirelapancia.org/wp-content/uploads/2013/02/Images.png

I currently have installed StatPress to monitor traffic, but of course you know what that means do not use Google Analytics!

Thank you.