Programming Mode Not Working (Keyless Entry)

2005 TRD Off-Road
Trying to program a new keyless entry remote. Used the following instructions, but my truck will NOT go into programming mode. Any ideas?

The vehicle should meet the following conditions before proceeding:
*The key is NOT in the ignition
*Driver’s door is OPEN (The others are CLOSED)
*Drivers door UNLOCKED (Not necessary for Echo)
1) INSERT and REMOVE the key from the ignition cylinder, TWICE within 5 seconds 2) CLOSE and OPEN the driver’s door TWICE within 40 seconds
3) INSERT and REMOVE the key into the ignition cylinder
4) CLOSE and OPEN the driver’s door TWICE within 40 seconds
5) INSERT the key in the ignition and CLOSE the driver’s door
6) Turn the ignition switch from LOCK to ON and back to LOCK at approx. 1 sec. Intervals “ 2” times to enter REWRITE MODE
7) REMOVE the key from the ignition (The door locks are cycled LOCK-UNLOCK within 3 seconds TWICE to let you know that you have selected REWRITE MODE)
8) Within 40 seconds press BOTH the LOCK & UNLOCK buttons on the transmitter simultaneously for 1 second (Press and release).
9) Within 3 seconds press and release the LOCK button on the same transmitter (The door locks will cycle ONCE if the transmitter was recognized and TWICE if it was not recognized {if you get two cycles start over}).
10) Within 40 seconds repeat step 8 and 9 with any other transmitters you wish to program
11) One of the following will END the Rewrite mode; *40 seconds elapses *Drivers door is opened *Key inserted into the ignition cylinder *4 transmitters are registered

Step #6 Options:

*1 time it's for add mode
*2 times for rewrite mode
*3 times for confirmation mode