I have a white (celery green, actually) FW, and have had the same problem you do. The owner of the LQS is very familiar with FWs and said if I come in with it, she will make sure the bobbin case goes in properly. She said there is only one way to put them in where they will work. I haven't yet, but plan on taking it by soon. And, the needle threads from rt to left.
Kathy