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LTC1966 Malfunctioning

I have simulated using LTspiceXVII the LTC1966 RMS to DC converter for my application. But when tried to implement in reality it won't work in Lab.  Below is the screen capture of how i tried to implement.

In reality when as soon as i power the IC without any differential input/ with differential input my output was always -1.46V. Is anything wrong with the way I try to use the IC? 

Can somebody help me understanding the issue? Quick response is appreciated.