Solved! Please help me fix this audio problem

Dec 28, 2018
My mic is SF 920 and i buy it before 1 week. I tried mic on my pc but it wasn't work. I plugged in the mic and when I speak mic just recording silence,and my voice is muted it dosen't important do I speak loud or not it just recording noise.Please help me. Do i need new audio card or something else??