|check your alligator clip connections
It's relatively easy to miss the metal part of the flower petals on LilyPad output and sensor modules. Here's an example of how that happens. Notice how the red clip on the left has a good hold on the module, but the metal part of the alligator clip is not touching the metal part of the petal.
And, here's a good connection. The metal on the red clip is now touching the metal on the petal.