I installed ISPConfig 2.2.24 on CentOS 5.1 following "The perfect setup".
I created a ftp user for the only site I have and it seems to be ok either with
WS_FTP pro or ISPConfig ftp.
The webmaster told me that ftp (FileZilla) is very slow and it asks for username and password continuously. ftp can upload 5-10 files very quickly and the it stops for 20-30 seconds.
He tried to upload the site (drupal) but he got "internal server error".
Any idea of the problem?