asset depreciation area greyed out

Hi All,

The depreciation area 32 is greyed out so the user can't enter values manually.

I have checked through OABC & OABD & removed the identical check box. if i remove the check box

they cant post the assets and if i dont remove they cant change the life of assets ,But the solution architect is stating that this is not the correct

thing to do this he is not giving a go ahead. He is asking me to find an alternate way.

Can anybody help???

Thanks in advance.