postfix dovecot smtp sasl

Hello, I have followed the "3c. Configure SASL Authentication with TLS" part on mysql-apache-php.com but It does not work.

I get something like this on the mail.log:

Code:

Aug 26 01:36:09 server postfix/master[4742]: warning: process /usr/lib/postfix/proxymap pid 5167 exit status 1
Aug 26 01:36:09 server postfix/master[4742]: warning: /usr/lib/postfix/proxymap: bad command startup -- throttling
Aug 26 01:37:09 server postfix/proxymap[5219]: warning: could allocate space for only 128 open files
Aug 26 01:37:09 server postfix/proxymap[5219]: fatal: fcntl F_DUPFD: Invalid argument
Aug 26 01:37:10 server postfix/smtpd[5092]: warning: private/proxymap socket: service dict_proxy_open: Connection reset by peer
Aug 26 01:37:10 server postfix/master[4742]: warning: process /usr/lib/postfix/proxymap pid 5219 exit status 1

What do you think the problem is?