Captcha not showing

For some reason, the text shown in cpatcha section in the registration page is not showing up. The header shows, but the captcha image doesn't load. It usually happens when the image-link is broken.

Could anyone please help me!

 

Here is the server analysis, egenrated by Tidypics

PHP version 5.3.2
GD Enabled Elgg requires the GD extension to be loaded
IMagick PHP extension Disabled
exec() Enabled Required for ImageMagick command line
Memory Available to PHP 32MB Change memory_limit to increase
Memory Used to Load This Page 6.71 MB This is approximately the minimum per page
Max File Upload Size 200MB Max size of an uploaded image
Max Post Size 200MB Max post size = sum of images + html form
Max Input Time 60 s Time script waits for upload to finish
Max Execution Time 30 s Max time a script will run
GD imagejpeg Enabled
GD imagepng Enabled
GD imagegif Enabled
EXIF Disabled