I also use FileZilla and this FTP client got problem with copy files without extensions - like file 'xupnpd-arm'. Just compare file size at your HDD and inside TV.
Tray other FTP client (for example Firefox plugin - FireFTP).
Or if your still prefer FileZilla tray this:
- change file name to 'xupnpd-arm.a'
- transfer this file to TV
- rename file back to 'xupnpd-arm'