Interfacing 3.3 Volt Logic sensors with CRIO

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We have bought a sensor board that includes a 3 axis: Acceleration, Gyroscope, and Magnetometer. It is interfaced via the i2c bus using 3.3 volt logic. We have spent alot of time trying to use our logic level converter ic to translate the logic levels however nothing has worked. We are now trying to just run the 5 volt logic directly to the sensors and this is not working. Does anybody have any ideas of how we should best proceed?