Channel 3 and 4 not working

[blitit]

Yesterday i received a brand new AF studio. All channels work well except for 3 & 4. The channel detects an input (line/mic LED lights up) but VU meter doesnt show, nor sound out of it.
Here´s a video https://www.youtube.com/watch?v=Yjt_FR38APQ&feature=youtu.be
I already submitted a ticket to arturia. Just wanted to see if there´s anybody out there who has experienced this.

Cheers

[Terrym]

Hi looking at the video what have you got on the inserts ?