Man thanks alot u saved me !, so how it worked :
1. troubleshooted and it showed that the GX wont work with usb 3.0 properly , so , removed from usb 3.0 and connected to 2.0, took 2 mins to install , now both my krk kns 8400 , and my microphone which is connected to GX that is also using podfarm 2 is working ! , thanks again man ! hope it works for all of us !
Update : My microphone is only working with podfarm 2 and i can hear a playback , but doesn't work with skype or team speak , or windows's voice recorder...