Perhaps check that the NTA services is running on the SolarWinds server
you could also fire up a wire shark capture and see any traffic
I am receiving Traffic on Flow Configured Interfaces with 30 Minutes of Delay. I need real Time Traffic flow with maximum 20 Second Delay. How I can reduce the capture time from 30 Minutes to 20 Second?
if you are getting chunks of netflow data and not minute by minute check this out