Maybe the LNB is not getting power from the receiver. Check your receiver settings to verify that the lnb power is on. A powered meter would be providing power to the lnb so it would work then.
The workaround I do is to manually add channels that you want to not get scanned over. Then when they scan in with a different name they won't overwrite the channel that you added. You can then delete the one with the name you don't want.
I'd suggest you use VLC on a computer to go through the feeds to find some working ones before you try to put them on your system. Glad to be of assistance where I can.
There was some format that they said the streams have to be in for the mini to be able to play it back. I was going to investigate but it seemed like a pain to try and look for streams via format and then hope they were something you actually wanted to watch.