I have been sewing for too many years to admit. My sewing maching is probably over 20years old, but has always been faithful. My problem is—-I am altering the sleeves and shoulders of my sons T-shirts. Everytime, I start to sew, the needle goes down, but does not pick up the bobbin thread. I have sewed other items, so I know its not my machine. I have adjusted the tension, changed needles, changed thread, switched to stretch all to to success. Am I going batty or did I forget someting. I know with all the new technology that I have not kept up on could be the problem, but I seriously need assistance. I really can’t afford another machine and am at a loss as to what to do next.