I cant reset my security questions even thought I have a rescue address. How am I suppose to reset them?

I am trying to buy songs for my iTunes account but security questions needs to be answered. I have forgotten the answers and went online for the FAQ to find out how to change them. Although I have a rescue email, I still can't see the link that allows me to change my security questions. Therefore I cannot follow Apple's requests on how to change them and I am not sure how since those options seem to be unavailable to me.