unable to connect to internet with BSNL Teracom modem/rouer + WIFI + Iphone 3g

Hi,
I am having a BSNL Teracom Modem/router. I did setup a wireless connection & able to browse on my computer.
I am also able to view my wifi network on my iphone 3g , but unable to connect to the same. Any help/instructions would be greatly appreciated.

Make sure that you have configured the modem according to this guide

Teracom Type-II ADSL MODEM MULTIUSER CONFIGURATION

1. Set up your modem in PPPoE (Link above).

2. Enable DHCP in your modem.

3. In the TCP/IP properties of your connection set " Obtain IP address automatically " on all machines.

Now you will be able to connect.