Please help!!

[Smurf_Town]

I just bought sims 3    and i came home today really hoping to play, but when i put the disc in to install it.. i was let down.  You see i need to install it but when i put the disc in... there was no Autorun screen! then i went to start and then computer and it wasnt there either!! im very sad that i cant play and none of my friends have ever had this issue. I am running Windows Vista (if that matters) anddd its really annoying... think you can help?