My expansion pack is gone

I had my EA account for several years on my computer with CD access. I bought the Cats and Dogs expansion pack on CD. Now I have a new laptop and couldn't log into my old account, so I had to create new one, but I don't have CD access on the laptop, so now I can't play with the expansion pack. Do you have any idea what I can do now, or do I have to buy it again? Thank you.