folders view

Dear ftp riders,
I have home a wireless router when i started a FTP server.
When I access this server with Internet explorer all work perfectly. I make download and upload with success.
When I use Smart FTP client, the login work perfectly but when I try access the folders it give me 550 error permission denied. This problem appear when I try to access ftp server with this client from inside of LAN or from INTERNET.
Why with Microsoft IE work perfectly and with smart FTP I can only login and can not access the folders.
Thank you very much for your help

You are accessing the folder in a different way or you are not accessing the same folder. Please post the log from SmartFTP.