I would take it back to the auto locksmith and demand he sort it out to be honest. Surely programming the key for remote locking is half of the job!
When I needed a new key I found about 3 different methods of programming the remote, probably the same ones you have found that suggest you press the accelerator pedal three times, lock the door five times, touch your nose, stand on one leg and turn around on the spot while you honk the horn. That sort of thing. That was on a 2005 IS300 and as you may gather I couldn't get it to work.
In the end I took it to a Lexus dealer and they charged me £50 to program the key and did a free valet of my car and a visual mechanical inspection while they had it.