color transform problem

I am trying to do a second color transform on a second element in my scene. The first one is working fine but, for a reason I don’t know, the second one is not working. I have included the correct element under the color transform effect, but when I try to multiply a color channel by moving the color slider it has no effect on the element. The only thing I can think of is that this was a vector element I created and it was taken from my library. Oh also I am using the trial version of TBS on this computer. Can anyone tell me why this is happening? Thanks

As far as I know one can use the Colour-Transform-Element as many times as one likes.
Have you applied the appropriate Key-frame (Plus-button in the Properties window) ?