Tp Link Routher Config To Tata Indicom Zyxel 3947

Had ZyXEL -3947 Want To COnnet New TP-Link Routher Via LAn WireTrying to setup Zyxel To new Tp Link TL-WR841N modem+router+Router.The installation CD is useless.I connected cable from Zyxel to T P Link and t p Link to laptop.Was able to connect to internet.However when I remove the cable, the connection fails.Tried connecting through WIFI access point but cannot connect.Please help in configuring the router. Urgent Basis Plzzzzzzzzzzzzzzzzzz

I am not familiar with the ZyXEL model, I presume its a ADSL modem. You need not make any changes in it ( I presume it works as a standalone unit). For the setup of the wifi router see http://www.tp-link.com/lk/products/details/?model=TL-WR841N#down download the user guide which should tell you how to setup this unit.