Two audio tracks in APT via Handbrake

Hey there...
I encoded one of my DVDs, using Handbrake.
Basically, I chose the AppleTV presets... except for the audio setup.
Here, I set up a second audio track (number one being english, with the second one being german).

So, Handbrake created a mp4 file as it was set up to.
I transferred that file to my ATV, using iTunes.
Now... everything works great. Except for the audio settings.
When I play that encoded movie in iTunes, I can choose either the one, or the other audio track as I like. On AppleTV however, it would just play using track 2 - which is weird for one.
I can't change the tracks, like you would be able to when you rented a movie in the Store...

Is there a special setting in Handbrake, that allows ATV to recognize that there are two audio tracks in the mp4? Or is there another workaround?

Thanks a bunch in advance!

Mark