After the filament has fully exited the first-stage feeder, the AMS is still performing the unloading process with the LED status of the feeder in solid red (as shown below). This is possible that there is a broken filament inside the internal hub unit that leads to the unloading failure....
You might need to hit it quite hard on the table - sometimes the lubricant dries up so it gets stuck. If you're using the transistor then try switching the wires around - if it's connected the wrong way around it won't work. The metal part must be flat on your desk and facing aw...