Error using nofollow

When I choose to use nofollow, the following error shows in the top of posts/pages:

Warning: preg_replace_callback(): Requires argument 2, ‘<a rel=”nofollow”\1’, to be a valid callback in /home/doceblog/public_html/wp-content/plugins/wpa-seo-auto-linker/wpa-seo-auto-linker-functions.php on line 35

PS: Very nice plugin ??