Could not connect to FTP server

Hi

I'm a new user of SmartFTP. I was testing this FTP client but I encountered a problem in connecting to an FTP server.
I was trying to connect to ftp.drivehq.com but unsuccessfuly.
I always get the following error "An established connection was aborted by the software in your host machine".
Can anyone help in telling me how to solve this problem ?

Thank you