c# ftp firewall

Hello everybody, I have developped a web application which should upload files to a Ftp server. But I didn't succeed these uploads. I use a Ftp command file : Ftp_Upload.bat : ftp -n -i -s:"C:\Essai_Ftp\ftp_cmd.txt">"C:\Essai_Ftp\ftp.log" Ftp file ftp_cmd.txt : OPEN 100.100.100.100 user...