Don't get the cart before the horse. Follow the instructions in the Apple instructions I referenced step-by-step. That will systematically narrow the solution space and hopefully isolate the source of the problem. Remember these troubleshooting axioms:
Follow the instructions step-by-step
Never make more than one change at a time
Don't get impatient
If we knew what it was we were doing, it wouldn't be called research, would it?
