Duplicate Problems (Easy Question)

I’m sure there’s a really simple, obvious answer to this, but I can’t seem to find it in any FAQ.

I duplicated an object 3 times (a light that spins around). I wanted to stagger the animation, so that they don’t all flash in unison; however, everytime I change the IPO curve on one object, it changes all three. How do I seperate them, so I can animate them individually?

https://blenderartists.org/forum/viewtopic.php?t=39424

I knew it was simple. Thanks!