I got the S-A-S double sided tape, but for some reason I can't get it to stick. Do you have any idea what I'm doing wrong? Thanks

Sometimes the tape won't stick if the fabric is heavily sized, and those precut shapes usually are so they won't fray.

Try double sided wonder tape, it doesn't require fusing, it's sticky on both sides, and washes out. I use it all the time when I hand applique instead of pins. You can find it at Ericas.com or createforless.com or I think Joann's also has it.

Thank you so very much for your help. I will try that.