My soundcard is Asus Xonar DX, my mic is in " Stereo Mix" input... i can't record song at all.
It's not my headset/microphone because it works well in audacity,
and it's not the settings in Action because, in windows7, if i change " Stereo Mix" ( My soundcard's input for my microphone ) for Webcam Mic, for exemple, I can record with the webcam's mic.... but I don't want this

The mic on the Siberia V2 ( Steelseries ) is better than my webcam mic....
has someone got a fix, or settings for windows to allow record with an Asus soundcard with Action ?
Thank

and sorry for my English, i'm French