The seeds I planted weren't powdered, but they were about 1/4" solid, black---about 40 were released when one seed pod opened. In general, where are the seeds located in the pods, and how are they released? Now, I also have "powder" like seeds which I shook out of the top part of the pod, but they could just be dirt. I'm re-trying planting both types following your instructions.
I'm also going to buy some seeds on line and try planting them as well until I get the harvesting thing right. I went to the park and picked up about 100 pods last month right after they bloomed. How long are the pods good for that are lying in the ground?