I know when I married my security system to my bike, timing was critical. Each time I waited the 10 minute cycle, you had to get to the ignition within 2 seconds. It took me several tries, but I got it eventually. For the record, I tried to read a book or magazine while I waited, I didn't get it right until I stared at the light until it was time to turn the ignition. Oh yeah, I could talk on the phone and do it either.
I may have waited too long. I might try it again.....pull up a chair and a few recreational beverages and see what happens. So you're saying that when the light goes out you've only got a couple of seconds?