This is going to take a little work, so hopefully you're up to it.
Copy the file over to a blank USB stick or HD.
Connect the SMP to your TV using the COMPOSITE connections. Do NOT use HDMI.
Reset the SMP back to defaults via the menu.
Unplug any Wired network connections, and do NOT connect it to your WiFi network during the setup.
Plug the USB in and wait until the LED stops flashing.
Play the movie.