buzzben:
This happened because (As the picture shown) there isn't supposed to be a 10K ohms resistor on the RD connection..
Once I removed that resistor, everything works like a charm!!!
Curious, I have an actual CTE shield, not the Sainsmart rip off of a CTE shield, and my shield has the 10k resistor, and my display works as it should. But so long as it is working for you now, that's all that matters, glad your display is not damaged 
Regards,
Graham