Captcha Image & Text Missing
The solution is the gd module (php_gd.so for Unix or php_gd2.dll for Windows). The php.ini file MUST display the gd module is loading and MUST include the Freetype Support, Linkage, and Version lines or the type of Captcha you are using in your scripts will not work.
The reCaptcha format you use in your "Reply to Thread" form on this support webpage would be a better choice as it does not depend on PHP's gd module. Perhaps the next version of Web Assist's User Registration Pack will use the reCaptcha format?
For now, my issue is resolved since we've installed the proper php_gd module. Thanks for all your help getting this issue resolved.