i think i found the problem, it may not have been clear before, but you had to include '#inclue' in the file. dont just put "header.inc", you have to put:
#include "header.inc."
all of it (quotes and all). hope it helped, it did for me
but i now have another problem, i cant save any of my renderings, even if i export it from Ac3d, then re-open it with pov-ray. i just cant figure it out. :?