Your procedure sounds like the one in the owner's manual for my '02 Expy. Did you perform the 8-time off-on cycle WITHIN 10 seconds? Was the key "on" at the end of the 8th cycle? The doors will ONLY lock/unlock if you end at "on" at the end of the 8th cycle. Try it again, and once you confirm the unlock/lock clunk in the door, remember to hit ANY buttom on the remote within 20 seconds to "program" the remote fob. You must program ALL your remote fobs with this procedure, not just the new one you're adding to your existing one(s). Good luck if I told you something you didn't know.