424crash:
The code didn't work on my board. im having the same problem.
That's not enough information for us to help you.
What code? My sample of using A6/A7 on a Uno? Retrolefty's editing of boards.txt? Uploading OptiBoot to a preassembled Nano? Uploading a bootloader to a homemade Nano clone?
What problem? stk500 errors? The PC recognizing the Arduino? Baud rates? Board types?