Mac Os X Server 10.4 And Windows Server



I have mac os x 10.4 server installed. Im hosting a ftp server. UNIX and MAC os user can connect to it without problem. Windows (XP) user can connect to it but they can't see any of the files in the server. It happens when they use an ftp client like smartftp or other, if they use iexplorer or firefox they can connect to the server and see the files.

How can I make the server work for windows platform ftp clients.

Thank you