Couldn't verify device, i can,t unlock the bootloader

[m13usrn9]

I was trying to unlock my phone's bootloader but the flash unlock tool shows me this error:"Couldn't verify device , can't get info".
I registered my Mi account on "Mi Unlock Status" section in Developer options and logged in (in the unlock tool) by using the same account .

 

[Avis_Xaxadu]

Check your data-cable and instructions for connect.

 

[Avis_Xaxadu]

Use the latest MI Unlock...