Why I cannot mirror my screen from ASUS T100 using Miracast function?

The ASUS T100 Wi-Fi modules supports dual bands(2.4GHz/5GHz). However when T100 enters mirror mode, it switches to 5GHz for transmitting Miracast related protocol packets. QCast is only support 2.4GHz which means the 5GHz mirror linking request from T100 won’t be aware by QCast.