Call to undefined function wp_insert_link()

when people try and post comments to my site, including me, i get the message:

Fatal error: Call to undefined function wp_insert_link() in /home2/public_html/What.the/wp-content/themes/cherryblossom-10/functions.php(395) : eval()’d code on line 6

now i have no idea where this eval() thing on line 6 is, or what that even means, i even tried to REdefine wp_insert_link().. by copying and pasting the code from wordpress includes or where ever it is…. i mean of course its not found in the functions.php file, it’s defined somewhere else… do anybody know what to do about this error, it’s not the theme’s fault people told me they were getting errors, and there’s another one they get, and i get too, ‘we don’t allow comment spam, you have to use javascript to leave a comment’… now what the heck is that supposed to me??? you use text to leave a comment!!! argh is there anything better than wordpress out there?