You may have sorted this problem out by now, but I've just read your post. Am not familiar with this machine, but I'm assuming it has an embroidery unit to attach. I had the same thing happened to me, and sent my Brother - with emb unit - for servicing, only to find it didn't fix the problem. The repair guy didn't realise that the embroidery unit has to be serviced as well, and after doing this, everything worked like new.