My 2000 EB has decided it doesn't want a new key fob for unlocking the doors. I did this about a year ago with no problems, but my wife left her keys at our son's house in Waco so I was trying to get her a temporary set to use. I tried the key-on-key-off-8-times procedure 3-4 times and got nothing this time. The doors never locked-unlocked to let me know it was in programming mode. Is there a maximum number of times you can do this, and then you have to take it to the dealer, or some crap like that going on?