RTKNAVI rover configuration

Hello everyone. I am using RTKLIB for real-time GPS data processing using my NEO6M u-blox GPS module and NTRIP caster service. I have successfully connected the receiver and also NTRIP caster and as the output on RTKNAVI pane I am getting SNR bars for the base station (NTRIP CASTER) but they are grey and the rover is showing no bars.

Apart from it,no lat long is coming on display. The reason maybe is that my rover( GPS receiver) is not configured for navigation messages but I don’t know how to resolve it. On option pane at output pane, it is not allowing me to check for latitude and longitude. Kindly help in this regard.