otto "Most preferably" actually means we didn't tested the add-on with such low version of GD and can't say in advance if it will work with it. It's possible it doesn't work exactly because of that. For determining a reason, view the source of Captcha page, locate Captcha's HTML code and paste it directly in the browser's address field. If it will say something like "Impossible to generate an image because it contains errors", view that page's source again and there you will probably find the missing function or the reason of error.
If you are not sure why it's not working, try to contact me privately providing your server details, I could debug and investigate it at no fee (and maybe also let the default add-on work with older version of GD). |