Using PBP Hex Files with FED Pic Programmer

[jrudd]

I downloaded PBPDEMO and Codelite and I'm trying to program a 16F877 using my FED Pic Development/Programmer Board.
I can find and load the PBP generated Hex File with the FED software and it indicates that I have programmed the device successfully. However, the program(Blink an LED) won't work.

Using Wiz C Pro to compile, the program still works with the programmer so hardware is OK. Any thoughts on what I might look at to solve this?
Thanks,
John

[mister_e]

look at your oscillator speed... case it's not 4MHZ... add this line
DEFINE OSC 20 'or the crystal speed u r using.