Is your machine set into a table or on top? If it's on top, all of the quilt must be up on your table or it won't feed. A big quilt is too heavy for a machine to sew and feed. As Buckeye Rose mentioned, on straight stitching your feed dogs remain up. Are you using a high loft batt? That will make it harder to feed also. Your very brave for attempting a Queen size on a domestic machine. I've only done a twin so far.