Getting Started With Arduino: Pushbutton Project Problems

I have recently became interested in Arduino, and was working through the "Getting Started With Arduino (2nd Edition), but when I came to the second project I encountered a problem. I have layout the wires and components exactly as specified, and my code is the same as well (The book can be found online here:http://quarknet.fnal.gov/fnal-uc/quarknet-summerresearch/QNET-2011/project_files/teacher_files/Getting_Started_with_Arduino.pdf. The project is under "Using a pushbutton to control the LED") I have been looking at this for a while now, and i just cannot tell what is wrong with the project. If you see anyway that i could have messed up the project, then please tell me. I can give more details if requested.

Thank you very much.

I encountered a problem

What problem?

Post your code and/or a picture, drawing or schematic of your wiring. Also, describe your problem!

Check and make sure your LED is not backwards.

Dave