i cant enable spam filtering

Virtualmin Theme version: 6.7
Virtualmin version: 3.66
Operating system: Ubuntu Linux 8.10
Failed to save enabled features : The procmail command procmail has 0 permissions, when it should be setuid and setgid to root. Email may not be properly delivered or checked for spam.
Call Stack Trace
File Line Function
/usr/share/webmin/virtual-server/save_newfeatures.cgi 67 virtual_server::error
(eval 84) 6 (eval)
/usr/share/webmin/miniserv.pl 2119 (eval)
/usr/share/webmin/miniserv.pl 736 miniserv::handle_request

i tried this one but the file procmail-wrapper cannot be found,

procmail module and software are installed

chmod 6755 /usr/bin/procmail-wrapper