SSH change default port via ssh.plist

I have to change SSH default port on Snow Leopard server. There's a hint that works with my home snow leopard but don't work on server why?

This method edit ssh.plist

<key>Sockets</key>

<dict>

<key>Listeners</key>

<dict>

<key>SockServiceName</key>

<string>ssh</string>

<key>Bonjour</key>

<array>

<string>ssh</string>

<string>sftp-ssh</string>

</array>

</dict>

<key>Listeners2</key>

<dict>

<key>SockServiceName</key>

<string>22022</string>

</dict>

</dict>