Try inserting a video track below the track that has your EPS event. Create a generated white media and place it directly beneath the EPS event. Do you now see it? Otherwise, you might try creating a different version EPS. They're not all created equal.
Something to keep in mind when working in 3d space. When creating an object it may exist in z space in front of the effects light source. Therefore, it can just look "black" until you move the light source or object.
I think it depends on how you generate the EPS. I know if you're using an illustrator *.AI file in some of the boris plugins it needs to be saved as version 9 or earlier I think. Which is several versions back.