2 Sided Presets not working for peeps

[Galaxyshadow]

So I've made 2 different preset for mah friends and they both had two different colored eyes. But for them they show up yellow and black instead of what they are supposed to be. How do I fix this, I sent them the .material file and everything they needed for it (The eyes show up yellow and black)

[Shazadah]

Are the image types for the eyes the same as what's in the .material file?

And did you export the presets for them? If so then the name of the exported preset must match how their username should be. Same goes for how they type the username when they log in, it should match the preset.

[Galaxyshadow]

Yes the eye file names did match what it said in the .material file and no I did not export it for them. Should I?

[ArcticGalaxy]

If you haven't already, try exporting them as a .png file and changing the .material coding accordingly.

[D-ead7Dog]

It doesn't matter if you export it for them because then your accounts might be linked when you go to put in their username to export it correctly.
Anyways. Make sure the files are .png as said above and check the material file. If  you want we could look over it ourselves and it might be easier to point out the problem.
If you want to do that, copy and past the material file here so we can see it and show us what you saved the files as; png or jpg.