I am having Belkin ADSL Modem with Wir...

hi

if the connectivity u r referring to is of the computers to the internet then there are a few steps involved

1. check to see the ip address provided to you by the ISP and group your ip address range to the same range
2. check to see if you require any DNS server addresses
3. check to see when the router is connected at the internet port from the modem then is it having signal at the port numbered 1 only or is there no signal at all ports 1-4
4. if there is signal at port1 but not on other ports then instead of connectng the cable from the modem at the INTERNET port connect it to port1 and it will be distributed to all the ports 2-3 also there will be wireless connectivity too

cheers
Pls rate if this was any help