filezilla "wrong port"

[dieselsmoke]

quote "Connected, waiting for authentication
Protocol error: Unknown protocol identifier (0x50 0x50 0x4. Most likely connected to the wrong port.
Connection to server closed.
Trying to reconnect in 5 seconds" i just downloaded filezilla, cant get it to connect. i'm using the right server name, and password. it doesent give me a place to enter my username, except at the beginng of the server name. it's showing connected, but kicks out for port.

[YamiKaitou]

What port are you using? FTP is 21 or 20 (depends on host settings, most are 21)

[dieselsmoke]

What port are you using? FTP is 21 or 20 (depends on host settings, most are 21)

I'm using 21.