Cannot connect or list '/' at FTP site (ftp.bitsontherun.com)

Okay, so I am trying out the FTP option to upload files larger than 100MB. I am using Transmit on OSX Lion. Here are the settings I'm using:

The error is:

Could not retrieve file listing for "/". Control connection timed out.

Here are my settings:

Protocol: FTP
Server: ftp.bitsontherun.com
User Name: <my email address, the same as I use to logon to this site>
Password: <same as I use to logon to this site>
Port: 21
Use Passive Mode: Unchecked (and I have also tried checked)

Is the site down?

Thanks!