Make sure you are inserting the card right way up. The leads should be on top with the card logo on the bottom.

I've been running into this problem over the last week. Seems that if the filament isn't tight on the spool, the "bouncing" that occurs causes the feeder to think the filament has run out.

Another thing to note, if you're near the printer when it "runs out" DO NOT press the Resume button before the head reaches Home. Every time I've done that the print head goes to the center of the bed and tries to rest the nozzle on the bed... even if there's a print there!

Make sure you are inserting the card right way up. The leads should be on top with the card logo on the bottom.