Unfortunately there is nothing we can do in this situation.
The key file's keys are encrypted with your password, so if that password is no longer available, the keys cannot be decrypted and thus cannot access / decrypt your encrypted files.
One thing I would suggest you to try is to turn caps lock ON and re-enter the passwords, maybe this was accidentally the case when you initially created it.
Another issue I sometimes face is a switched keyboard layout. For example, if your password contains
y, try with
z instead (and vice versa).