Error 0161 0163 IBM ThinkPad 600x 2645 4EU?

Tell me any one how I go about the POP password on an IBM ThinkPad 600x 2645 4EU after replacing the C’mos battery and the Battery pack do to Error 0161, 0163. I'm holding the F1 Key to go into and change the time and date and it looks like it's asking for a password next to a Lock. Can this password be Bypass I try the Shorting out the PAD, removing the the Cmo's Baterry for 20 minor and I'm still getting the same, display 0161 0163 follow by two beep then the Lock next to a monitorlike figure and Ablinking Curser. is there a password I can Use, what can I do to enter to set the time and date.