VSFPT - 425 Failed to establish connection

Hey all, hopefully someone can help me out. I am working on an FTP server to transport some backups overnight. I changed the default ports and now get this error on the client side "425 Failed to establish connection.". I can login fine, it only appears when I try to transfer a file. When checking the directory I found that the file had transfered properly. It looks like VSFTP is sending information back to the client on a port that is blocked by the firewall. Does anyone know a way I can configure VSFTP to only use port 2012 for example for all connections to and from the server?

Basically it seems that vsftpd is choosing a random high numbered port, eg 57000 to connect back to the client. Is there away I can assign a default port for it to use instead? Otherwise it will never get past the firewall.