Somebody? Please help me... I tried almost everything...
Checking the box is about all you can do. Are you trying to use Ray-traced rendering? If so, it is no longer being supported and never worked as it should anyway.
If that's not the problem we need system and AE details down to the last decimal point and an explanation of your workflow down to the effects and techniques you are attempting to use.
Did you ever solve your issue? If so, let us know how you did it. If not, also let us know so we can assist you further.