TPS23861: current limit process

Part Number: TPS23861

Tool/software:

Hi Sir,

may we know some question and learn from you, 

sometime, when i modify the Icut setting at register address 40h/2Ah/ 2Bh( as shown below), 

we POE loader still triggers OCP at the default value of around 20W,

because according to us settings, OCP should only occur at 31W.

i2cset -fy 0 0x20 0x40 0xF0
i2cset -fy 0 0x20 0x2A 0x55
i2cset -fy 0 0x20 0x2B 0x55

Do we need to send any additional command to actually write the changes successfully ? thanks.