[imp] Help with enabling spam reporting

[HiP-HiPpO]

I created the file imp/conf/backends.local.php with only the following  
contents.  When logging in, I see no additional option to report  
mail as spam.  How do I enable reporting? 

<?php 
$conf['spam']['reporting'] = true; 
$conf['spam']['spamfolder'] = Spam; 
$conf['notspam']['reporting'] = true; 
$conf['notspam']['spamfolder'] = Inbox; 
$conf['spam']['program'] = '/usr/bin/spamc -C report -u %l'; 
$conf['notspam']['program'] = '/usr/bin/spamc -C revoke -u %l'; 
   
Horde version 5.2.12 
Imp version 6.2.16 
   
Thank you, Art