More Corel X3/Epilog Print Fill Problems

Hello All,
I'm having issues where Corel/Epilog will not print fills as shown on the screen. For example, after "smart filling" an area with a postscript pattern, then printing, the filled pattern is only a grayscale fill. The image on the screen is correct, and there are no underlying fills causing this. This seems to occur randomly, and I can sometimes fix it by "recreating" the outline of the fill, deleting the original outline, and re-filling it, particularly when the original problem fills were created using imported outlines (but this does not work consistently). I can draw a simple filled rectangle and it prints fine in the same file. I like a lot of features of Corel, but there seem to be lots of annoying "quirks" when working with imported files; I don't know if this is Corel or Epilog driver related.
Thanks for any input, Charles