vsftpd 421 data timeout

Hi to all..
I'm a newbie and I've configured a complete Linux Webserver on my company but I've still some problems.
First of all is the one in the object.
I'm oblayed to use vsftpd in association with PAM auth and Mysql and when I'm trying to upload files greater than 50Mb it says "421 data timeout". Anyone could help me please?? Thanks anyway to everyone! Enrico

 

What's in your vsftpd.conf? Which distribution are you using?

 

I'm using Ubuntu Server (Intrepid Ibex).
Here you have the vsftpd.conf:

listen=YES
anonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=022
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
nopriv_user=vsftpd
chroot_local_user=YES
secure_chroot_dir=/var/run/vsftpd
pam_service_name=vsftpd
rsa_cert_file=/etc/ssl/certs/vsftpd.pem
guest_enable=YES
guest_username=vsftpd
local_root=/home/$USER
user_sub_token=$USER
virtual_use_local_privs=YES
user_config_dir=/etc/vsftpd_user_conf

 

Looks ok. Do you use some kind of firewall that cuts traffic after 50 MB?

 

...nothing... and today I've notice that I've the same problem also in download...

 

No router firewall, no personal firewall on your desktop, no firewall on the server?

 

...nothing...

 

Have you tried both active and passive transfers in your FTP client?

 

Not really. What's the difference?

I'll try...

Enrico