Error installing Paged Comments plugin

I’m trying to install the Paged Comments Plugin (http://www.keyvan.net/code/paged-comments/) and I’m having an error that breaks my template.

The error in single pages says..:

´Warning: include(header_single.php) [function.include]: failed to open stream: No such file or directory in /home/.ergo/pandeblog/blog.solonatacion.com/wp-content/plugins/paged-comments.php(79) : eval()'d code on line 1

Warning: include() [function.include]: Failed opening 'header_single.php' for inclusion (include_path='.:/usr/local/php5/lib/php') in /home/.ergo/pandeblog/blog.solonatacion.com/wp-content/plugins/paged-comments.php(79) : eval()'d code on line`

You can see it live here:

http://www.blog.solonatacion.com/2006/09/20-question-tuesday/