my hp CQ61 problem

My Compaq Presario CQ61 was working fine with OS X, caccu.nl . I charged it as I have done so many times.


Now when I boot I get an error system canot recognize or find the battery. Without the power


adapter plugged in it will not work at all. I take the battery off and then the system boots


fine but shuts down sometimes. I have read that I need to flash the bios which is AO6. Any


ideas on how to correct this. I can see if the battery was failing but it shows 0% while the


adapter is plugged in.