ProFTP directory listing

Hi, I’m starting to be desperate because I’ve been doing tests all day, and I can not get the FTP server to work for me.
I installed a Virtualmin on a new machine, and no matter how hard I try, I can not make Proftpd work. From my PC or from other computers on the network, I can not get it to show the directory. It is logged, but it does not show the directory listing.
This is the filezilla dialog:

Status: Resolving the address of
Status: Connecting to …
Status: Connection established, waiting for the welcome message …
Status: Registered in
Status: Retrieving the directory listing …
Command: PWD
Answer: 257 “/” is the current directory
Command: TYPE I
Answer: 200 Type established in I
Command: PASV
Answer: 227 Entering Passive Mode (151,80,32,36,254,153).
Command: MLSD
Error: The data connection could not be established: ETIMEDOUT - The connection attempt exceeded the timeout

Solucionado…problemas con el Firewall