LCD screen displays white boxes on bottom line instead of text

Hello. I have just received my Arduino Uno today and I am really enjoying playing with it. However, when I try to connect my LCD screen to the board, I cannot get text to display. I have checked my connections so many times and I am still unable to solve the issue.

Below is an image showing the problem I am having. I am using this for the code: http://arduino.cc/en/Tutorial/LiquidCrystal and the LCD screen came with the arduino uno in the Arduino Starter kit.

Any help would be appreciated as this is really bugging me now.

James

Ive just spotted my mistake. (look at the four brown wires) Its reasons like this I should not be aloud near the internet.. XD