Norton Internet Security 2012

A problem has occurred in Outlook Express, since I downloaded Internet Security 2012 nine days ago.

I normally receive emails from certain restaurant groups offering discounbt vouchers. One of the groups is called 'ASK restaurants' and they require you to click on the restaurant that you intend to visit. To do this, you first have to click on a box that results in a drop-down menu containing the names of all the restaurants in the group. However, when I click on this box, nothing happens!

 

Exactly the same happens with other groups that have drop-down menus in their website. Since everything worked normally with Internet Security 2011, there has to be something in '2012' that is preventing me from completing the procedure.

 

Has anyone else had a similar problem? I would appreciate some help in trying to find out how to cure this. Has something been enabled or disabled to increase security? I shall look forward to some replies.

Josh