My new 3060 had Version 2.1 build 107 (Release) when I received it.
The first time it connected to the service, it downloaded the channel
guide, etc. but I had no Replay Zones. The second time it connected it
downloaded the Zones. I then forced a net connect twice more, the first
time it didn't appear to do much, but the second time it downloaded 3.0.
It then rebooted and I now have 3.0 with no problems.
Note that I usually get very good V.90 modem connections on my phone lines
(I'm connected at 53,333 bps right now). Although it doesn't look like
your problem is with the download (unless it is getting corrupted
somehow, but this seems unlikely).
So based on my experience, it doesn't look like the problem is with
2.1 build 107.
Space - AB8NdtJzDULjgKvuDX3eJxHpXx88Xy9H