Problems using Ray compatible stages / skyboxes

[57331Fury]

I`m getting endless errors when trying to load in either a ray-cast stage or skybox. Most of the time I get an error message stating "Failed to open source file: '../../Shader/Skybox.fxsub'", so are not able to use them, even though others can use them with no issues. This problem happens on about 80-90% of all the ray-compatible stages and skyboxes that I have got.

I also am not able to use the Time of Day skybox effect as I get a similar message (all the other ones work, just not Time of Day). I have bought a new gfx card since I first had the problem, and installed the latest drivers, so its not an issue with the card or drivers. I have redownloaded MMD and MME numerous times, tried the 32 and 64 bit versions but nothing seems to work.

Any help would be hugely appriciated.

Edit: My bad, i`m only getting the issue on Skyboxes / Skydomes, and not on Stages