Hello Sue,
I can't remember if you have dials or levere, I think you have dials, you should have straight stitch on the pattern dial and then put the stitch length dial on 0 and then select your stitch length, if it helps you can email a picture to clarify things, type my address as you say it not as you read it.
Ken
drivewithken at blueyonder dot co dot uk, January 2010