I have problems using TS with my new Bluetooth-Headset Elegiant S1.

Windows Playback: default device: Elegiant S1 Stereo

Windows Recording: default device: Elegiant S1 Hands-Free

TS Capture: default

TS Playback: default

Result:
Good Sound. But as soon as I start speaking in TS, all sound output ceases. In fact everything else that uses sound stops ouright. (mp3-player, flash, etc.)

Alternative tries:

Windows Playback Default Device: Elegiant S1 Stereo
Windows Recording Default Device: Elegiant S1 Hands-Free
TS Playback: Elegiant S1 Hands-Free
TS Capture: Default
Results:
Same as above + horrible sound.

Windows Playback Default Device: Elegiant S1 Hands-Free
Windows Recording Default Device: Elegiant S1 Hands-Free
TS Playback: Default
TS Capture: Default
Results:
Horrible Sound. And echo cancellation doesn't work.

Windows Playback Default Device: Elegiant S1 Stereo
Windows Playback Default Communication Device: Elegiant S1 Hands-Free
Windows Recording Default Device: Elegiant S1 Hands-Free
TS Playback: Default
TS Capture: Default
Results:
Both problems combined. Horrible Sound. No echo cancellation. And stops other programs.

Windows Playback Default Device: Elegiant S1 Stereo
Windows Playback Default Communication Device: Elegiant S1 Hands-Free
Windows Recording Default Device: Elegiant S1 Hands-Free
TS Playback: Default
TS Capture: Elegiant S1 Hands-Free
Results:
Sound ok. This time other programs aren't outright stopped but "only" silenced.

Any advice?