WIFI SHIED ARDUINO NO CONNECT !

I have problems with wifi shield just purchased. I tried various SKETCH but the shield is not connected. LED turns on but then the server disconnects without giving any error message. There needs to be some setting?

It could be in your server. I have two locations I use the shield in and in one I can not get the server to accept it and keep it connected. Unfortunately I have not found a soloution for this yet. But check in the server's configuration that it will accept new connections.