1997 Cadillac STS anti theft system wont allow me to start

NOW IT COULD BE A KEY ISSUE. IT MIGHT NEED REPROGRAMED. DOES YOUR KEYLESS ENTERY WORK?
KEYLESS REMOTE PROGRAMING
1. IGNITION ON NOT STARTED
2. GROUND SINGLE WIRE CONNECTOR (LOCATED IN THE TRUNK PULL DOWN UNIT)
3. WAIT FOR THE DOORS TO LOCK & UNLOCK ( A FEW SECONDS)
4. PRESS THE UNLOCK BUTTON TWICE (2), PAUSE BETWEEN PUSHES FOR A SECOND
5WAIT FOR THE LOCKS TO LOCK/UNLOCK (A FEW SECONDS)
6. REMOVE THE GROUND WIRE FROM THE BLACK CONNECTOR
IF THIS RESET DOES NOT WORK, YOU MAY HAVE TO REPROGRAM THE KEY.