It's a good idea to narrow down the potential causes first. Let's start with the FTP settings. Download
FileZilla (or any other FTP client software) and test the FTP settings. If FileZilla fails to connect, then your problem lies with the FTP settings and you need to recheck the FTP account. If it connects, you still may want to check your game settings to make sure they are consistent. Also, you can try setting the FTP mode to "Passive" to see if that works for you.