How far along did you quilt? I agree with the ladies, minky would not be my beginning choice for backing.
Are you trying to do free motion meadering or just straight line? For straight line, try using the walking foot. For free motion, make sure the your feeddog is down you have the free motion foot. Instead, of rolling the quilt, try fluffing it thru. Do make a sample piece and practice to see how it works. Good luck, hope that helps.