How to get rid of Fatal error: Out of memory

Hello everyone,

I am using dmsguestbook version 1.1.2 with WordPress 3.0.1.. I am using two different languages (english and spanish) and guestbook for them on my website.

In english version, this plugin is working absolutely fine. But in spanish version, its not working. While submitting the form with correct information its displaying an error:

Fatal error: Out of memory (allocated 31981568) (tried to allocate 77824 bytes) in /wp-admin/includes/image.php on line 281

Again, i tried to submit the form and i got the following error.

Fatal error: Out of memory (allocated 31981568) (tried to allocate 77824 bytes) in /wp-admin/includes/media.php on line 317

I tried to increase my memory allocation size using ini_set(‘memory_limit’,’256M’) on index.php(wp-content/themes/theme-name/index.php), on dmsguestbook.php and on the template page as well.

Tried using .htacess. But, i failed each time.

Please help me on this. I did not modify any functions of this plugin manually.