Can't use the Publish button to upload my WebDesigner 9 website file to Magix Online

Well, actually I CAN use the button, it just doesn't work :-) - - - -Get the error message, "a connection to the server can not be established"

What I CAN do is:

Export all of my web designer 9 files to my local drive then use FileZilla to FTP upload them to my Magix Online website

Works fine. website works fine. Life is groovy, boss, far-out, phat, rad and sweet.

What I can NOT do is:

Use the "Publish" button feature in Web Designer 9 to publish/upload my files to MOW.

I am using the correct userid and password (the same userid/password pair that is being used successfully to do the FTP)