As you need to have edited the code from the page you linked to, I'll assume that you made some typo there. But you still don't tell me which exact part of the code you used, and what exact changes you made.

If you are modifying a script, that makes you a programmer. To become a successful programmer, you will have to learn the main technique associated with it, that is, attention to detail. If you want to successfully communicate about faults in your programs that you can't find, you will have to show others your program as it is, because if you don't know where the fault in your program is, how do you expect others to divine the fault by your (neccessarily) vague retelling alone?