Is there anything in particular that I need to do to get the spam probability analysis in the GUI to work?

I have been using version .511 for about a week now and have seen over 12000 messages come through the spam filter. Everything seems to be in order, but when I take any message and send it through the Spam Proability analysis in the GUI the only results I ever get are two lines; one that says *****RESULTS**** and another that says: spam probability 0%. I never see anything else. Even if I take the contents of a message that came through and got quarantined because it was 100%, the probability analysis in the GUI will show the same two lines.

I have enabled the showtokens setting in the ini file and I do get to see the probability of the tokens that way, but I don't understand why the one in the GUI isn't working. Is there a setting somewhere to enable it?

thanks