the same way how u load / unload film from a film slr. check your battery port for connections and make sure you insert your batteries correctly. one of the 2 red leds in your viewfinder actually helps you to figure if your batteries are dead or not. read the manual bro.
most importantly, after each shot when you wind,
make sure the film winder is turning
that'l give you a good indication then film is loaded properly
and advancing properly...