Virtual Users And Domains With Postfix, Courier And MySQL (Fedora Core 5)

[sneaky_russian]

I have followed this guide step by step and have come across this problem.
I have formatted and started again and still get the same problem

If i telnet to the server i get this:
# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.

In the error log i get this:
Sep 25 14:14:10 mail postfix/smtpd[17476]: fatal: no SASL authentication mechanisms
Sep 25 14:14:11 mail postfix/master[8082]: warning: process /usr/libexec/postfix/smtpd pid 17476 exit status 1
Sep 25 14:14:11 mail postfix/master[8082]: warning: /usr/libexec/postfix/smtpd: bad command startup -- throttling

anyone got any ideas as im pulling my hair out!

TIA