newbie help! am i using it right

i am trying to upload files to a Mediamax ftp server.
All indications are that the files are being uploaded up until it does a file size comparrison check,
It then says no such file and retutrns a zero byte result.
I am brand new to this so please no techy answers.
I've uploaded a homepage to another server with no problems.
The program settings are identical with no filtering or exceptions