Hello Peggy,
It is quite common for people to forget to put a drop of oil now and again on the presser bar, the presser bar is a very tight fit and does not take long to seize, put a few drops of WD40 on the presser bar and let it run down overnight and hopefully it will seep all the way through, put some kitchen roll over the teeth to soak up any oil but only but a few drops on,
Ken
drivewithken, February 2010