1999 Land Cruiser remote programming help needed

Hi, I have the key that starts and locks the vehicle but its remote does not work. The battery seems fine. The red light flashes when any of the three buttons is pressed.
How do I program the remote to work? Please help.
Thanks,

Hold down Lock & Unlock for about 10 seconds to see if this resynchronizes the remote to the vehicle.

Hold down Lock & Unlock for about 10 seconds to see if this resynchronizes the remote to the vehicle.
I assume it is on the remote that I press the Lock & Unlock. But is it at the same time or separetly?

i have 1999 landcruiser v8, with new remote keys but the remote dint work, how do i reprogram it to work with the jeep