B772 x64 I could see all of the 772 servers. Only one non-passworded, Shakedown. I had all of the content installed but the server didn't think I had the GT cars. Clicked getmod and it flashed through the download links but did not download anything. Unsuccessful in getting into the only 772 server. Edit: Might be helpful if there were an ISI server there to test on.
I think I saw a B772 test server by ISI But that problem you have could be a server related (bad links, bad config) and nothing important or rFactor2 related.