Can you post a photo, so we can see how it is connected.
Can you post the sketch, or is it still the same as on bildr ?
Do you have a multimeter, to measure the signal from the PIR sensor ?
Is it a 12V PIR sensor or 5V ? The Sparkfun PIR sensor is 12V.
If you have connected the 12V wrong, the pir sensor or a pin on the Arduino could be damaged.