i took it to the dealer. their head tech had to call ford tech support. the 2010 remote start has new programming.

Any time you open the door it kills the engine. A new safety feature, THAT F-IN BLOWS.............. If i had known that I would not have paid for the option.

OK after a quick search here's what i found. MyKey is the problem and it can be disabled, see link.

Remote Start and MyKey - Blue Oval Forums