can't connect to ftp..

Status: Selected port usually in use by a different protocol.
Status: Connecting to 173.255.245.57:21...
Response: fzSftp started, protocol_version=8
Command: open "zadmin_lonewolf@173.255.245.57" 21
Error: Connection timed out after 20 seconds of inactivity
Error: Could not connect to server
Status: Waiting to retry...
Status: Connecting to 173.255.245.57:21...
Response: fzSftp started, protocol_version=8
Command: open "zadmin_lonewolf@173.255.245.57" 21
Error: Connection timed out after 20 seconds of inactivity
Error: Could not connect to server

hello i need help getting ftp to work with sentora i opened the ports for ftp on the firewall within CentOS 7 but it still doesn't let me connect and I not sure where the problem is but i will keep looking around on google and the forums until i get response or figure it out.... thank you.