Changing Render Preset Cancels FFX Render

[hometime]

I have a FinalRender Preset I built that if I change to it after having my FFX grid in the scene cancels the FFX effect render in the scene. I know the preset works because if I then delete the FFX grid, redraw one and run the sim, then render it renders normally. Any idea why this is happening?
It's quite frustrating since even if I save a preset as a default Max doesn't remember the full settings only the renderer upon opening a new scene, though a saved scene does retain the fR options I have set.

Thanks,
Don