Modding asus crosshair v formula z using usb flashback problems

Hello ,
I have some problems with my pc i try to mod my bois for m.2 and the problem is i cant use my flashback usb , And when i try to press to my flashback button every light turns of notting happend even my mainbord light disappears . can somebody help me

Pc specs :
asus crosshair v formula z
fx 9590
4gb hyperx 2400mhz x2
gtx 770
coolermaster 700w

Sorry for my bad english

Nobody ?