why doesn't my key remote lock/unlock on drivers side? other doors work fine on 2001 Lexus RX300

a few months ago my remote quit locking/unlocking on the drivers side - the other doors work fine

Asked by for the 2001 Lexus RX300
It's probably a failed actuater in the driver's door, done two this month on RX300s but can't remember the cost of the bill. Probably $80 diagnostic charge, $75 to fit part $150 for part and tax.