Yes, they're moving as they're should. I'm sure it's playing in 5.1, however the driver/codec is downmixing it to stereo when in DTS/DDL mode. (Or perhaps is actually just outputing stereo PCM, I have no way to tell from my receiver.)
SoundCheck reports Realtek Digital Output as 2 channels when...
I used the 5.1 Surround Test File from here in both WMA and AC3 formats, with WMP and Media Player Classic (with AC3Filter for sound, set to 5.1 output).
So I bought a MSI Z87-GD65 motherboard with an ALC1150 codec. MSI licenses neither DDL nor DTS with this board. The modded driver allows me to select DDL or DTS, and the sound and test tones work, HOWEVER the sound is limited to to two channels (stereo). The test tone is only stereo, 5.1 media...