Is your miner setup for DHCP?
Why I ask:
Several cable providers offer up to 10 IP addresses that will DHCP through the modem. If Time Warner doesn't (they are known for their stingy behavior) then you'll need a router.
If so, you can pick up a very cheap (under $10.00) router or switch from Ebay. The chances of them being bad are very slim. All you need is a simple 4 port router and you're good to go.
Let us know how it goes

-H
I don't know if my miner setup for DHCP. but when I login to the time warner cable modern I click on DHCP my miner are not listed or show. it like they not even connect to the internet or the modern. what is the best router to get at walmart that can get the job done.