cant copy from one directory to another

I faced a problem when I tried to copy files from one directory to another using certain user although this user has r/w/x permission on source and destination directory ?? the OS is Linux-Suse 9
any help??

You will get no help at all, because nobody can possibly guess what problem you faced. Tell us the problem, then maybe we can help you.

I have the following scenario ,I connect to a server through ftp then pull a file from certain directory and then backup the same file on a second directory on the same server...no problem in pulling the file but when try to backup the file on the backup directory I got permission denied ...the owner on source and destination directories are the ftp user and it has a full permission...