problem Connectsafe Sito jammed harmful Web!

Good morning I have a problem with norton there is a site that up to I entered instead 2 days ago now without problems it doesn't make me enter and the writing appears me:   
Connectsafe Sito jammed harmful Web!  
But it is not a harmful site. And' sure  
I hope that you will resolve me the problem, because it is an important site for me and I use him/it every day.  
I wait for news  
Thanks  
Regards