Adding a dissolve to a second layer image

So, as with most of everyone I've seen, I am having some trouble acclimating to FCP X. Here is my issue:

I simply want to have a logo zoom in over a white background. I want it to fade in and out as the logo gets bigger. When I try to add a cross dissolve to the logo, it automatically goes onto the first layer(the white background) and wont allow me to add it to the logo. I have done many things like this in the past with previous versions o f Final Cut, so I am at a loss as to why this is not working. Can anyone help? I'd appreciate it.

The logo has to be made into a storyline to apply a transition, or you can open video animations (control-V) for the clip and double click opacity. There are fade handles on the start and end of every clip that you can use to ram the opacity up and down.

All the best,

Tom