Norton Internet Security 2012 and Yahoo Mail problem

Hi

 

I have NIS 19.2. Each time I attempt to log into Yahoo Mail I get this message about upgrading:

 

You're almost there... The newest version of Yahoo!7 Mail works best on modern browsers. While you can still access basic email functionality like reading and sending email, to access other features like Yahoo!7 Messenger, photo slideshows, and the reply bar, you'll need to upgrade your browser.

 

Upgrading is free and it only takes a few moments:

  I am using Internet Explore 9.0.8112.16421IC and have tried re-installing and still get this message.