Can't drag and drop in Explorer FTP

I am able to log on to my FTP site and view the files there.  I can drag content over to the FTP from my computer, and I can drag content to my computer from the FTP.  FTP to FTP dragging and dropping (such as dragging a file into a folder) is prohibited.  Copying and pasting inside the FTP is also prohibited.

This happens the same whether or not I have the location mapped as a network location.

I tried changing some things in internet options including lowering security, making sure "drag and drop/copy and paste" is enabled, and adding my FTP to my trusted sites.  Still can't drag and drop inside the Explorer window.

Any ideas?

-Sam