Donna Jean,
You do have a Singer 66-16? The 16 indicates that my machine is a non-tredle(sp). Their are two notches inside the bobbin case. After I load the bobbin clockwise, I pass the thtread from left to right, first through the left side notch and then through the right side notch. I pull about 10cm. of thread, close the cover and pass the thread through the slit in the cover. I manually move the needle down and up, thereby catching the bobbin thread. Does any of that sound familiar?
Regards
evensteven