The network port on the HR21 could be defective.
I looked at my 2Wire earlier today and reset defaults just to see if I'd done something and it didn't change how my receivers showed up.
I'd say at this point you either have a defective 2Wire or HR21.
Not sure you posted this or not, but when you used the same cable between your laptop and the 2Wire, was the ethernet LED lit on the 2Wire?
If so, then I'd say it's the HR21, because without the same LED lit by the HR21, you aren't going to get anything.
Yes the green light on the 2WIRE lit immediately as soon as I plugged it into my laptop without doing anything. Nothing ever has lit up when plugged into the DVR.