I made these a couple of weeks ago, and I thought that I was finished with them. As you can see, I glued Pins to the main body of the pieces of jewelry, but at the days end, when I went to pick them up, the pins came off! Therefore, I would appreciate it if some one can tell me how to secure these pins together more securely? I plan on selling them, but I can't if the pins won't stay secured...HELP!