I bought a Denso key with Lexus logo on ebay. I had it cut at Ace Hardware. The instructions I used were supplied by key seller. I was able to program key to start engine, but not to lock and unlock the doors. I believe I followed instructions correctly, but remote never went into programming mode. Is it possible that the new key chip is not compatible with the gs430? what are my options? I do have a working master key that does operate the doors and starts the engine.