Old MagSafe Airline Adapter not working with MacBook Pro Retina

I've got an old MagSafe Airline Adapter (one I bought when it first came out) that I'm trying to use with my MacBook Pro Retina (using a MagSafe to MagSafe 2 Converter). Sometimes the light is green, sometimes it is off, sometimes the battery icon in the menu bar shows plugged in, sometimes not, but in any combination, the machine is not maintaining charge; the battery discharges at a normal rate for just being on battery. For giggles, I borrowed my seatmate's year-or-two-old MagSafe adapter (the one with the right-angle plug) and plugged it into my machine (also using the MagSafe to MagSafe 2 converter). The light on that one turns orange, and though the battery icon shows "Not Charging", the battery is maintaining charge with the newer adapter. (My adapter, BTW, is able to maintain the charge on her 13" MacBook Pro.)
Was there a change to recent versions of this adapter to make the new ones work with the Retina MacBooks where the old one will not?

the green light on the mag safe turns on?
you should reduce your usage to a very minimal amount as I'm sure the airline doesn't output a strong enough signal for you to be running full screen films with high res. Maybe you should close your macbook P and see if it is charged after a little while of not using it.
turn your screen lights down, turn the sound gHZ down, quit all the downloadin'.
if you must run flash make sure you have the latest version (from the adobe site).
You're computer is intense and if you use it more then it's gaining, of course it going to be draining .
But this is probably moot since you're probably on said plane now. or was.
I'd imagine if you're not satisfied with the product you should return it detailing your situation.

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