SP flash tool can`t detect my ZTE Blade A1 (c880u)

Hi all. I have problem with sp flash tool - cant detect my phone ( zte blade a1 c880u ). I have installed all enought drivers, but flash tool cant find my phone.. I follow this guide - https://www.youtube.com/watch?v=7kzMJ058xpw. I test that on windows 7 x86 and windows 10 x64 but flashtool cant find my phone..

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