Hi there !

The majority of laptops will either encode or hash the password meaning that the password you type IS NOT the password that the BIOS set on the HDD.

Try to find and option on BIOS to check if the BIOS is hashing, encoding or writing the true password that you set.

If the BIOS does set the password exactly as you type (not likely) you can later remove the password using something like Victoria.

If the laptop encodes or hashes the password you will need either to remove the password with a firmware tool (depends on the drive) or buy a laptop of the exact same model to unlock the drive ...

What is the full drive model by the way ?

ATA password are VERY EASY to bypass with firmware tools and don't offer any protection .... Just get rid of it and ENCRYPT the hard drive with something like TrueCrypt or Veracrypt if you do need "protection" against people accessing your data.