Title: Captcha Image Error
Last modified: August 22, 2016

---

# Captcha Image Error

 *  [crazydevila](https://wordpress.org/support/users/crazydevila/)
 * (@crazydevila)
 * [11 years, 8 months ago](https://wordpress.org/support/topic/captcha-image-error/)
 * Hi,
 * my captcha image is not showing. It is not htaccess or php sessions error but
   when I checked the server logs it gives me this error:
 *     ```
       libpng warning: Application built with libpng-1.2.51 but running with 1.5.15
       PHP Warning:  imagepng(): gd-png error: cannot allocate libpng main struct in /home/.../public_html/wp-content/plugins/si-captcha-for-wordpress/captcha/securimage.php on line 903
       ```
   
 * Any idea how to fix this?
 * Thanks!
 * [https://wordpress.org/plugins/si-contact-form/](https://wordpress.org/plugins/si-contact-form/)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [mbrsolution](https://wordpress.org/support/users/mbrsolution/)
 * (@mbrsolution)
 * [11 years, 8 months ago](https://wordpress.org/support/topic/captcha-image-error/#post-5294531)
 * Hi crazydevila try the following [URL](http://www.fastsecurecontactform.com/problem-captcha-image).
 * Thank you
 *  [Mike Challis](https://wordpress.org/support/users/mikechallis/)
 * (@mikechallis)
 * [11 years, 8 months ago](https://wordpress.org/support/topic/captcha-image-error/#post-5294570)
 * Show that error to your web host support. Ask them to fix their server. Php is
   compiled with a dependency error. They have to fix it.

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Captcha Image Error’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/si-contact-form_dde2be.svg)
 * [Fast Secure Contact Form](https://wordpress.org/plugins/si-contact-form/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/si-contact-form/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/si-contact-form/)
 * [Active Topics](https://wordpress.org/support/plugin/si-contact-form/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/si-contact-form/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/si-contact-form/reviews/)

 * 2 replies
 * 3 participants
 * Last reply from: [Mike Challis](https://wordpress.org/support/users/mikechallis/)
 * Last activity: [11 years, 8 months ago](https://wordpress.org/support/topic/captcha-image-error/#post-5294570)
 * Status: not resolved