Afraid to register for xm radio because of Nortons.

Hey all,

 

 I just paid $250 for a unit and installation of xm radio in my car. Now I need to purchase a programing package and activate my reciever on the xmradio.com website.

 

Whenever I try to activate the reciever Nortons says the security certificate is out of date on xms website and warns me not to go there. What the heck am I to do? Now I am afraid to purchase a monthly package.

 

Can anyone test this site or has anyone went ahead and purchased a package anyway? I mean xm radio is a huge company right.