Preserving FBX animations in maya?

This is really a maya question but I was hoping someone else using Maya and Unity3D might have already figured it out.

I have an FBX with multiple animations in it. If I pull it straight into Unity3D I get a model with all the animations on it.

However if I import it to Maya, edit it, and then export it again as an FBX, all I get is the first animation renamed "Take 001".

How can I preserve all the animations when modifying an FBX?

Thanks

JK