Need to access internet on two computers simultaneously

Hello

Respected friends
I am having a Home 900 plan from Bsnl(unlimited) and i already have a desktop computer connected to it.
Now i also have a new laptop and need an internet access on it as well..
I have tried sharing the internet using a switch etc but it didn't work.
Can anyone advise me on how i can get a connection for both the computers simultaneously from the same line??
I don't mind paying some extra charges (if applicable for multiple connections in a home plan).

Please advise me as its important and urgent for me ...I will be really grateful to all those who can help me...
God bless you all!!!

your modem make , number and your OS details required
so that some one will be able to answer your query .

http://www.indiabroadband.net/airtel...computers.html