Unable to connect to internet on HD DVR

I just had my DTV service hooked up and I'm trying to get On Demand working.  I have a large internal network running private, static addressing in 10.1.1.x block.  I entered all the IP info in the Advanced Setup Screen and when I tell it to connect, everything comes up OK and the Network says "connected" but the Internet doesn't connect and I get an Error (22)

I know the IP settings and the cable are all good, because when I plug my laptop into the ethernet cable with the same IP settings, it connects to the internet immediately.

Any help and suggestions are greatly appreciated!!

Thx,

EF