No data acquired from a single-ended sensor

Now I have trouble with connecting a HIH-4000 relative humidity sensor to my NI DAQ equipment (PXIe-6341 hooked up with a SCB-68A).

Manual of HIH-4000 can be found here http://www.farnell.com/datasheets/1685535.pdf

First I enabled the Single-Ended sensor reading on SCB-68A by turning on switch 1 at S1.

And I hooked up -Ve to AI GND (67) and data to AI 0+(68), and +Ve to a external HP Power source of +5V. And I connected a 100kohm resistor between -Ve and Data as required on the manual.

I started with checking the Test Panel in NI MAX and found that I just received a constant reading using the RSE input configuration though I kept changing the ambient humidity.

I am wondering if I did something wrong with the connection.

Thanks guys.