I'm havng a slight problem with creating shadows in Poser and wondering if anyone can give me some advice.

This is a render I did of some book cover art and she is supposed to be carrying a torch.

There should be a very dark shadow behind him, but there's nothing. I've got the lights casting shadows and everything, but I must be missing something, and strangely enough, Poser's manual does exactly spell out how to create the shadows or trouble shoot the problems.