If your iPhone or iPad pops up the message "Connection Refused" this could be because of one of two things:
Macs:
1... You have not turned FTP on. Click here to learn how.
PC:
1... You have not installed an FTP server. Click here to learn how.
2... Your Firewall is stopping incoming connections from your iPhone. This is a feature of your computer to help protect you against internet hackers. Click here to learn how to check this.

button at the bottom of the screen in MediaTransfer and then click the
button.