New NPVR Install - HDHomeRun, black screen, low network rate

[dkreviews]

I've read bunch of posts about black screen, tried different decoders and no luck. My setup Windows 8.1, and HDHomeRun (the old gray one (gen2?) running on wifi) I am able to playback programs in VLC player just fine from HDHomeRun GUI and it shows decent network rate which is shown in HDHomeRun setup (8 Mbps). I configured in NextPVR and see all channels, but whenever I try to watch any channel Network Rate drops to 0.2Mbps and NextPVR interface becomes sluggish and just shows black screen. Any idea what could be an issue here? Is my HDHomeRun not supported or is WiFi & NextPVR don't go along?

[sub]

The usual reason for black screens with HDHomeRun is the firewall needs to have exclusions added for NDigitalHost.exe and NRecord.exe, so that NextPVR can receive data across the network from your device.