I'm very frustrating about that. I've an arduino due board and wifi shield, but i'm not able to make it work together. I've upload default sketch WiFiWebClient, but when i run it, no response is received from server (the shield connect perfectly to my network). I've try to run the same code on the same WiFi shield but on arduino uno, and it works. what's wrong with DUE+WiFi shield?
Is your shield compatible with the Due? There are many differences between the two boards. Off the top of my head, Due is 3.3v and Uno is 5v, and the wifi stuff may need 5v. If the board is programmed via SPI, on the Due, these are at the ICSP header. The Uno R3 duplicates pins 10-13 on the ICSP header, but the board be using the pins instead of the header.
the model of the shield is R3