Try the following url: http://www.fabioarmiliato.com/progress/index.php?option=com_googlesearch_cse&n=30&cof=FORID%3A11&ie=ISO-8859-1&q=Marco&hl=it&cr=countryIT
It works, isn't it.
What I've done is that I've removed the cx field.
So try going to the config page and empty the first field "Custom Search Engine's unique identifier (cx)". It should work.
So please double check your Custom Search Engine's unique identifier (cx). It's usually in the format 000455696194071821846:reviews, or
If it's the second format, you need to include the string "partner-pub-" too.
If it still doesn't work, if you do some googling, you will see that a possible likelyhood is that the adsense account has been black-listed by google. And the only way to find out is to check directly with google.