Hi MQ,
I have the crescendo and the walking foot that came with it. Is it the big white one that plugs into back of machine?
First, do you see the walking foot indicated on the screen area? It will say "DF" on the upper left area. Is the foot plugged in all the way?
Second, make sure the foot is tight on the shank and the holding screw is tight. No wiggle on the foot.
Check the attached foot on the WF and make sure the foot is secure.
I have never adjusted settings. What stitch length are you using? Do you have the extension table attached?
The foot has 3 different feet attachments available. Generally, I use the SITD one attached to walking foot.
PS: What stitch are you using? Mine is set up with WF so I can check for you.
Hope that helps! Rhonda