netgear router help

Hope someone can help i have a Netgear MR814v2tw router and have just bought a TP-LINK TL-WN510G card I am on VM broadband. When i install the card and scan I can see the signal strength is good but I cannot connect when i used a cabled connection it works fine hope someone has an answer. I also cannot access the router using IP it is an old telewest one and think they blocked access. when i have zero config on XP it asks for a netwrok id any ideas