Access previous Time Machine backups...

I've had a Mac Pro making regular Time Capsule backups for over a year now.

I recently decided to take the plunge and add a SSD to one of the free Mac Pro HD bays. After installing OSX I did the set up transfer assistant, transferring everything apart from the user accounts.

Because of the price of SSDs I had to buy quite a small drive and so have to store things like my iTunes and iPhoto libraries on a separate HD.

My question is, how can I access old Time Machine backups from the new drive? When I open the Time Machine it doesn't show any of my old backups.

Thanks!