Comments Plus – Trying to call comments twice & it doesn't work

I am trying to call the comments twice in a page and it isn’t working when I have comments plus installed. This is the code I am getting.

Fatal error: Cannot redeclare wdcp_comments_callback() (previously declared in public_html/ptcpeople.com/wp-content/plugins/comments-plus/lib/forms/wdcp-custom_comments_template.php:13) in /home/midsouth/public_html/ptcpeople.com/wp-content/plugins/comments-plus/lib/forms/wdcp-custom_comments_template.php on line 56