By default, most ftp clients will not allow you to delete a folder unless it is empty. Most ftp clients do have an option that will allow you to “force remove” a directory though. If you cannot find this option, you will have to first delete the contents of the directory and then try deleting it again.
If you are using SSH, put -R in front of your rm command.
If you continue to experience problems, please submit a help desk request and specify the path to the directory you would like removed and support will remove it for you. Please put “delete directory” in the subject line of your request.