I used a intractable (http://www.instructables.com/id/Secret-Knock-Detecting-Door-Lock/#step2) to create project using those exact steps. All the parts work and the code can be uploaded to the Arduino. I used the code on the website, but it does not seem to work. Are there any suggestions that anyone has to help make the project work?
If you want help from the instructables goons, post your question there. If you want help here, post your code and schematic here.
I am pretty new here myself, but I agree with, and can 100% understand what Paul is saying.
When buying a Ford, you don't necessarily take it to Toyota to fix when things aren't as you require. Nobody is going to wrap you in cotton wool and do it for you. Drop the code here, with explanations of errors, and you'll get plenty of help.