With my Pfaff I have found that if it isn't acting right it is usually because I don't have it threaded correctly or the bobbin is not in the right way. I have to get my book out and start at square one, step by step. Even after using this machine for over 6 years sometimes I suddenly do some odd thing with it. And it is not fussy about which brand of needle I use. I use Schmetz most of the time. If I hear clicking, it means it needs a new needle. Good luck.