Had a few issues with setting up a Wireless router up for a guy at work.

The setup we have is..

Linksys Router
BT Broadband line
Laptop with built in wireless

We have tried with 2 routers, both LinkSys

1 - If we power on the router and the laptop, the laptop sees the wireless network, but if we connect the router to the internet, the router restarts continiously.

2nd router - This when connected to the internet is fine, but will not issue an IP addy to the laptop.

The laptop works fine running through the router using RJ45.

Andy ideas?