I think I found it...
I didn't knew I had to type the port number after the IP


F:\>ftp
ftp> open 172.16.74.167 111
Connected to 172.16.74.167.
220 Serv-U FTP Server v4.2 for WinSock ready...
User (172.16.75.168none)): a
331 User name okay, need password.
Password:
230 User logged in, proceed.

thanks all for your help !!