SnapShot Pro: ftp_connect failed.Undefined index: use_custom_fields

I'm attempting to initiate a backup through SanpShot Pro, however, upon setting the plugin up I am running into some unknown and rather stubborn issue related to establishing a proper FTP connection. I've tested this FTP connection outside of SnapShot Pro and it works just fine using the same info and credentials. I would very much like to connect properly so that I may proceed with backing up the site and then ultimately moving it onto another server.

Your time and help are greatly appreciated.

Thank you,