WPMU Super Captcha

I have installed successfully all components that I wish to have so far. All are working but one. WPMU Super Captcha is not showing the image and will not allow anyone to log in. I changed the word.txt file to have only one word and tried both that word and no word to no success. Any clues? All help will be appreciated. Thank you. Robin – TGWAdmin http://www.tgworld.org/blogs and http://www.tgworld.org