FTP Folder Permissions

I have a user who is having trouble copying information from one folder on an FTP site to another folder. She is accessing the FTP site from a browser. She has Full Control over the parent folder, and I double checked…she has full control over the two folders that she is trying to copy information from and to. She can, however, download the files she is trying to copy to her own hard drive. Then upload them back to the other folder. Any ideas?

Note: It actually lets you right click and copy. Then when you try to go to another folder and right-click and paste, the paste option is grayed out.