[HELP]unlocking lenovo thinkstation p310 bios using amibcp 5.02.0031 problem

Hey everyone,

I have a lenovo thinkstation p310.I’m having trouble when I try to get access to hidden settings of its bios.Using amibcp 5.02.0031,I can open the bios dump file only one time.Because everytime after i save changes to bios(amibcp shows like “saving rom image…”),the moded file cannot be opened by amibcp again.IFAIK,that indicates the file was broken.My bios flash tests confirmed it.So does lenovo bioses cannot be moded?Or do they have customized file structure so cannot be moded and saved correctly by amibcp?Is there any way to mod this bios manually so i can get access to hidden settings?please look into this,Thanks.