I'm currently making doll clothes for DGD. Quilting had to be moved to the back of the line for a while. Today while working on cotton knit fabric, when starting a seam, the needle pushed the fabric down inside the throat plate instead of advancing it. I tried using a starter piece and finally got it to sew with a lot of pulling on the fabric. These require only quarter in seams. It would sew on a larger piece of doubled same fabric. I am using a ball point needle which I thought was for knits. Any suggestions would be appreciated. I have several patterns that call for knit fabric.