Hi Davewest,
can you help me? I have the problem, the image does not show.
my story:
I made a back-up of the server files at www.livemk.co.uk, I uploaded the same set of files into a new server, done all the config.... but captcha image does not show, you can see it here: www.uk-classads.co.uk/captcha_test.php.
Obviously the test at www.livemk.co.uk works

can you give me any hints?