All the above are good things to check, but do you also have it set on medium weave? The buttons second row from bottom in front on right? What type backing are you using? You might want to set it to heavy weave if you are using flannel or something heavier than quilting cotton. I had a quilt that I used a flannel from a major manufacturer for the backing. My Viking let me know it did not like it! Of course, the machine was new at that time, but I have used thinner flannel since. Could have been operator error!
Do you have it set to FMQ in menu? Do a quick check list using the manual.
One thing I remember doing, was when I threaded the machine, I did not go through the silver clip, which is the first thing you run the thread through. On MY directions, it says if horizontal, to go through the clip, if vertical, don't go through it. That helped a little. You might try both ways. Hope you find the trick to make it work! I know how frustrating it is when it gets picky!!
Last edited by yngldy; 12-06-2015 at 01:41 PM.