after UPC digital tv, chello not working on wireless

[umberto_soprano]

Hello,

I write in english, sorry, my german is still not good.

I live in Vienna. I have a netgear wireless router at home that I used without problems with chello (upc) since 3 years.

One month ago I bought a new upc package including digital tv, and they changed my modem. After this, I'm not anymore able to connect to the internet through my wireless router.

The laptop's mac address is copied to the router basic config as usual, but the router is never able to receive an IP address from DHCP.

If I try to connect my laptop to the modem, I'm able to receive the ip and to get to the web without problems.

I tested another netgear router, but I had the same problem.

Is it possible that chello is using something else than mac address to check which device is connected?

Any clue?

Thank you in advance,

Umberto