On some boards, you have to put a blob of solder on the board in order to select i2c. So make sure that you can see the device with i2cscanner.
Also, the due has problems with i2c. If you can't see it with i2cscanner, then you have to use a modified Wire.h file - https://raw.githubusercontent.com/bluesign2k/Arduino/d8d6d62853a5308c21b95dad4bdd64e358e857cc/hardware/arduino/sam/libraries/Wire/Wire.cpp