How to set tx attenuation on adrv9375?

Hi all,

I had tried to set attenuation TX2 using MYKONOS_setTx2Attenuation(&mykDevice, 10000)

and after that get attenuation value again using MYKONOS_getTx2Attenuation(&mykDevice, &u16Gain)

No error return. but value attenuation return is 1000.

Why i can't set attenuation for ad9375?

Thanks and brgs.