Henrik,

You've made it a little clearer for me, thanks. I'm going to work with this today to see if I can get it to work. Something is strange with the demo boards I've received from Microchip. I can't erase the chip and even blinking an LED can be a task. I'm not even sure if the program I'm compiling is even getting to the 18F4550 at certain times. When I make the same circuit on a breadboard it doesn't give me any problems so I may have two issues at the same time, which makes things even more difficult.

Chris