I opened Z-tool 2.0( using the run as administrator option)
i connected the cc2531 dongle ( running serial app )
i go to tools menu ->settings and under serial devices my ports were listed.
i gave the following settings baud rate 115200 Data bit : 8 , Parity :none , stop bit :1, flow control : none
but when i scan for my device , it says
NO devices found