Well you might want to make sure your entering in your WEP key correctly (if thats the issue), If it says connected, but no internet comes through, go to Start>control panel> Network connections and right click on your Wireless cards connection. Go to properties, and in the small list, click on TCP/IP and hit properties. Make sure that your computers wireless is set to DHCP (Or automatically obtain). If this does not work either, I would like to hear more info about this. Such as type/brand of wireless adapters and routers, if the router is pingable on the lappy, ect.
i have tried the things you have said still nothing.
i have a sagem 800 USB modem connected to the computer, a linksys wireless-G PCI adapter connected to the computer, a linksys wireless-G broadband router at the moment hardwired to the computer to see if that helps but doesn't. i have a linksys wireless-G note book adapter in my lap top, my laptop is saying i have connection from lap-card-router but not to the internet have you any more idea's plz.