Hasta La Motion!

I’m pretty new to compositing in Nuke, and currently trying to comp a rendering.

So heres my problem:

I rendered out some different passes like diffuse indirect specular reflection and so on.

When i try to comp my diffuse pass with my indirect pass by plugging them into a merge node (plus operation), i do get the desired result except for the eyes of my characters! Which is completely correct, because the indirect Pass itself does have the white eyes.

But when i look at my masterBeauty rendering from Maya which is the file the different passes are extracted, you can see that the eyes are as i would expect them to be.

So how do i comp the diffuse and indirect pass to get the eyes of my characters right like they are as in the masterBeauty?

Thanks in advance,

greetings