Sims 2 - 'Paint Still Life' problem

[klmc29]

I'm trying to get my Sim (with maximum creativity) to paint a still life painting. The little green box appears and it says "click 'c' when you pick a subject." Everything I want painted should be inside the green box when I press "c", right? I've done this and my artist never paints the subject I want him to... it's always something right outside the green box. Any idea why this is happening? What am I doing wrong?

[fight2]

hm... interesting...