connect() no file or directory

[Roelof Wobben]

Hello, I did all the steps from this page : http://www.postfix.org/SASL_README.html postconf -a gives cyrus and dovecot postconf -A gives me only cyrus. So it followed the cyrus steps on Centos 7. but as soon as I do :  testsaslauthd -u username -p password I see this as output :  connect() : no file or directory. How can I figure out which file or directory is missing ?