Router setup PB: no connection to internet

Hi Everyone,

I just moved and I can't have internet connection through my router in my new place.

Here are the facts:
- I can connect via cable when directly connected to the TimeWarner box
- I can connect via cable&wireless to the router but no internet
- I reinstalled fresh tomato firmware
- I have 2 routers linksys wrt54g (same problem with both)
- I checked the ethernet cable and it's fine (i can connect to the internet with it on the TWC box)

Now I'm not sure what I can try...
HELP please
Julien

 

Do you have internet if you connect directly to the TimeWarner box?
Have you reset the Linksys (press and hold the button in the back with a pin) and let the setup wizard try to make the connection?

 

Yes I have internet if I connect directly to the TW box.
On the router side I have tried: reset, fresh firmware install

nothing seems to work :cry