MaximusArael020

Hi! First time posting. I have Cura 4.9, with a Monoprice Select Mini 3D printer V2. Some gcodes that I have work absolutely fine and print well. All the ones I've been trying recently do not seem to work. I import them into Cura, hit the slice button, and export as gcode. When I try to print them, nothing happens. The Extruder and Platform heat up, but no movement. What am I doing wrong? I'm very new to this. Thanks!