postfix+cyrus error.

[Goldcoast POP3 server]

Hello we are receiveing the same error when we made the owner's changes to both postfix and cyrus (owner=postfix,cyrus; group=mail) any suggestion. help please.   Jun 18 16:40:53 mail postfix/pipe[957]: fatal: request to use mail system owner group id 12 Jun 18 16:40:54 mail postfix/local[937]: warning: end of input while receiving string data from service private/cyrus Jun 18 16:40:54 mail postfix/local[937]: warning: private/cyrus: malformed response Jun 18 16:40:54 mail postfix/master[913]: warning: process /usr/libexec/postfix/pipe pid 949 exit status 1 Jun 18 16:40:54 mail postfix/master[913]: warning: /usr/libexec/postfix/pipe: bad command startup -- throttling Jun 18 16:40:54 mail postfix/master[913]: warning: process /usr/libexec/postfix/pipe pid 954 exit status 1 Jun 18 16:40:54 mail postfix/local[950]: warning: end of input while receiving string data from service private/cyrus Jun 18 16:40:54 mail postfix/local[950]: warning: private/cyrus: malformed response Jun 18 16:40:54 mail postfix/master[913]: warning: process /usr/libexec/postfix/pipe pid 956 exit status 1 Jun 18 16:40:54 mail postfix/local[948]: warning: end of input while receiving string data from service private/cyrus Jun 18 16:40:54 mail postfix/local[948]: warning: private/cyrus: malformed response Jun 18 16:40:54 mail postfix/master[913]: warning: process /usr/libexec/postfix/pipe pid 957 exit status 1 Jun 18 16:40:54 mail postfix/local[951]: warning: end of input while receiving string data from service private/cyrus Jun 18 16:40:54 mail postfix/local[951]: warning: private/cyrus: malformed response