Your netmask is wrong on the default gateway ?
You should be able to get a response from "ping 204.176.49.3" (thats one of the tivo servers)#
#!/bin/sh
#
if /sbin/insmod -f /lib/modules/turbonet.o macaddr=00:0B:AD:0D:42:66 tim
then
export DYNAMIC_NET_DEV=eth0
/sbin/ifconfig eth0 192.168.2.200 netmask 255.255.255.0 up
/sbin/route.tivo add default gw 192.168.2.1 netmask 0.0.0.0
fi