Originally Posted by ThAbtO
Try setting your DHCP to the router's IP (usually 192.168.1.1).
Are you sure you mean DHCP?
and not DNS server?
If the the TiVo has the same IP number as the router, that's two devices with the same "address" and I don't think any good will come of that.
What I would suggest is to give everything on the network that doesn't travel a fixed IP address, shrink the router DHCP address pool down to one or two more addresses than needed with the fixed IP addresses outside of that range, reboot everything, and see if the computer can ping the TiVo's newly assigned fixed IP address.