Problem with Call Recordings Report Screen

We have as our module version for Call Recording (though he problem existed before upgrading). We are running Freepbx The page pulls up blank, HTTP 500 error. The logs have the following:
[Wed Mar 26 07:18:24 2014] [error] [client] PHP Fatal error: Call to undefined function recording_report_sales() in /var/www/html/admin/modules/recording_report/views/page.recording_report.php on line 285, referer: