LinkSprite 16X2 LCD Keypad Shield problems

I have a "Parallax 2x16 Serial LCD, Backlit" & a "LinkSprite 16X2 LCD Keypad Shield for Arduino Version B" and Im totaly lost, I can get the Hello World code to work but I cant get either one to do squat with any other hardware attached.
In this case I have identical hardware to what is shown and Im following this Tutorial :
everything works as showed up to 19.2 but when I get to 19.3 Nothing on LCD! Does anybody know why Im having such a problem?