I feel for you!!Nothing worse than trying it out, having it work, then on your project, nope! One thing I might suggest,,, look to see if a thicker seam or edge is causing the guide to stall. I have had this happen before when sewing on something thick. sometimes you have to change the direction of the button hole from horizontal to vertical, or the other way, depending on where the thickness is. Other than that, you can make them by hand, using a buttonhole stitch, but I've never done that except years ago. Before there was such a thing as a buttonhole maker. We had to learn that in home ec., my only time of doing it!!