LCD problems

So I have a 16x2 LCD screen hooked up to my Ard as shown in the tutorial http://arduino.cc/en/Tutorial/LiquidCrystal and I uploaded the sketch and nothing happened. What gives? what did I do wrong?

There's also a display contrast pin (Vo), power supply pins (+5V and Gnd) and LED Backlight (Bklt+ and BKlt-) pins that you can use to power the LCD, control the display contrast, and turn on and off the LED backlight, respectively.

Adjust the potentiometer to get the text to display at the contrast ratio you want.

Have you adjust the potentiometer for contrast and connect the LED Backlight pins?

Well, it seems that the problem was that I wasn't using a small enough value of potentiometer. I had a 100K hooked up. Switched to a 50K and I can now see the text as it scrolls happily along the screen. I can be such a noob sometimes.