The CAPTCHA image is not being displayed correctly on my site's link submission form, so visitors are unable to submit links. How can I fix this?

The CAPTCHA image system works correctly on most web servers that have Php's gd graphics library installed, but some unusual web server configurations are incompatible with generating the CAPTCHA image. If a broken image icon appears on your link submission form where the CAPTCHA image should be, this is likely the case with your web server. In most cases the only solution is to turn off the CAPTCHA image feature, by going to Change Settings >> Link Approval Settings, uncheck the checkbox labelled Include CAPTCHA Image in Link Submission Form and click Submit Changes.

In some cases the web server configuration that is preventing the CAPTCHA image feature from working can be fixed by the web host's tech support. To view the specific error message that is generated when the CAPTCHA image is created on your site, right-click on the broken image icon that appears on your link submission form, and select Properties. In the properties for the image you will see the image link URL, which will look something link this:

http://www.my-domain.com/linkmachine/linkmachine.php?ua=_ua158&seed=33066

Copy that URL into the address bar of your browser and open the page. You will see the error message that is generated when LinkMachine attempts to create the CAPTCHA image. Your web host's tech support may be able to fix the web server configuration problem that is causing the error.