CANNOT PLOT Outgoing Longwave Radiation New Goddard

[bluejacket]

I succesfully plot outgoing longwave radiation (olr) variable parameter using CAM and RRTMG longwave scheme on GrADS, but when I tried to plot olr on the NEW GODDARD longwave scheme model output, it says "constant value=0" at all time steps.
Anyone has solutions for this?
(I'm using WRF v3.5)