[RyanN]

With my experience with micro controllers, a steady power supply is definitely required. Even with my Homework Board that I used to run my "Weather Alert" system with, simply flipping a switch on and off would cause the micro controller to freeze and reset. After I added a large capacitor to the input power insulated with diodes and a voltage regulator, the problem seemed to be fixed. I think a 5V voltage regulator, some diodes, and a fairly large capacitor may help you. I'm not familiar with PIC controllers though, so this may not work, but hopefully it does. Also, have you considered that something may be wrong with your oscilloscope? Maybe like it is "shocking" your setup causing your problems. I would listen to Al though, he seems to be a veteran at everything electrical. Good luck.