z3x box today saying card not found [Answered]

Hi team i was using my z3x box till yesterday today when i m trying to run z3x software always saying card not found,it was find today just this happened
what to do?
i have install driver again restart computer many time no luck,
when i check device manager i can see yellow triangle driver i can not install even i choose manual driver install,i can see port connected but still can not open.