Can you adjust the pressure on you presser foot? Usually a thumb screw on the very top of the machine. Maybe there is too much pressure to allow your walking a foot to do its job.
Is it the correct walking foot for your machine? If your feed dogs are narrow and the walking foot is wide it will have problems pulling through. You shouldn't need to "help" it at all. That is a good way to break a needle. Ask me how I know...
Welcome to the board and let us know what you figure out.