Sendconnector changing port not working

Hi,

I have changed my sendconnector port to xx. and i have also changed receive connector port to anonymous inbound connection, and now it works perfectly. But when i change sendconnector/smtp to another port, then won't working (It's work perfectly by default). What to do I have changed sendconnector with this cmd, and firewall also is ok.

Set-SendConnector -Identity "XXXXXX" -Port XXXXX

regards 

Zlatan