Hi,
I don't think Vector will help with troubleshooting why you're not picking up ADSB. It shows whether the ground stations are picking up ADSB broadcast from your aircraft. I've looked at Vector with your Hex Code and can only see a PilotAware plot, which indicates your aircraft is only broadcasting using PilotAware freq / network. I'm not sure whether this is normal or whether you have an ADSB out device and would expect to see an ADSB plot also?
As far as the wifi dongle is concerned, you should be able to tell whether it is working by looking at the HOME screen where boxes are GREEN on the IP row or RADAR screen where the GSM box is GREEN (see attached picture with yellow arrows showing this).
Admin / experts please correct me if I'm wrong on this since I've only just started using it too.
Hope this helps,
Chris.