DM....I have not done much sewing with metallic thread but I do know that I had tons of trouble. One thing that did help me was to buy some needles made especially for sewing with metallic thread. Somehow they seem to have some kind of different eye and that helps the thread not get so tangled. If the store you bought machine from isn't too far away, I would take it and the thread there and ask them to show you what is going worng.