Lynnch

Hello, i am not sure if i am right here, but i hope that someone can help me.. I have the Corsair Virtuoso Wireless XT and it is an excellent Headset, but i cant switch from Stereo to 7.1 in the ICUE Software anymore. I was pretty sure , that i could change from stereo to 7.1 underneath the Soundbars. But its all Grey and it doesnt switch to 7.1. If anyone know what i do wrong, please tell me.