I'm not able to access BIOS and And i lost the log in password.

Hi,

I'm using IBM-P4 thinkcentre with windows XP SP3.

I'm not able to access BIOS. Because during booting the keyboard will not work. And i lost the log in password. I have another account with administrator privilege. I lost the password for both the account. I have Password recovery tool, But to boot the Password recovery tool i need to access BIOS. I have tried logging into safe mode administrator as user name and empty password. But non of them are working fine.
Now i'm not able to re install or repair the OS as well

Answering to this question will be greatly appreciated