You need to buy a needle specifically for metallic thread. Also, put the thread in a coffee mug and then feed it through your machine. Go S-L-O-W-L-Y as metallic thread gets hot when you go fast and that can also cause it to break. I tried to quilt a lap quilt with metallic thread and, like you, was ready to throw out my machine! Then I changed the backing from flannel to cotton and following all my suggestions above, it worked beautifully. Sulky recommends a 14/90 needle. Give that a try and good luck.