Thank you for the suggestions.
I had to change the category permissions in order to see the photo as a guest. Now that I can I do see the stars, but I don't see anything that I can click on to rate. This is what I see as a guest:
Is there another permission setting I need to change? Would I need to allow comments for guests in order to see if they get the rating link or not?
If I can't rate when logged out does that mean that the problem is not related to forum integration?
edit: Problem solved. It is working with the forum integration on. For the benefit of anybody else who has missed this, I was looking for a link to rate on the Photo page or on the quick comments area. I have to click on 'post a comment' and open up the new screen to see the place where ratings can be done.
Thanks for the help, Chuck.