Also worth noting that if you have multiple remote keys, all need to be programmed together, otherwise you will still have un-programmed keys, just not the one you originally had a problem with.
After programming the 1st key, you need to remove it (without going to position II) and insert then next within 10 seconds, then start the procedure again with the switching from position I to position II 4 times.
WorsleyBaz
April 2012