Drop Shadows

Hi guys,

I have a question about Drop Shadows in PS CS. After I add a drop shadow to one layer, I want to add different one to a different layer. However, the new layer that I want to add the drop shadow to will take on the characteristics of the other drop shadow -- as if they are linked somehow (they aren't). For instance, the first drop shadow will be dropped at a 90 degree angle, whereas the second drop shadow (which should be dropped at a 30 degree angle) will do the same thing as the first drop shadow -- no matter what I do. If I change either of the drop shadows' properties, the other one follows suit.

How can I prevent this?

Never mind, some people helped me Thanks Frans and Burke!

(It was the "Global Light" option that was screwing me up)