UBB.threads PHP Forum Software Community Forums UBB.threads 7 Version 7 Support Captcha with GD2

In order to use GD2, PHP will also need to support freetype, as these two work together. If you're on a hosted server you can see if your host can enable this. The other option is to use ImageMagick. If you have ssh access to the server, you can install this yourself, even if you don't have root access.