My modem is connecting problem,it will connect after five minits it will disconnect. modem model:utstarcom-wa3002g4

Thankuuu but nt activate it

I have a link about how to configure it to Always On mode with ADSL as the connection technology from the ISP.
http://www.indiabroadband.net/bsnl-broadband/4545-configuring-utstarcom-wa3002g4.html
If you are using other technology there might be difference on the settings. You can contact your ISP to find out the technology they are using which your modem connects to. You can apply for an additional IP address to improve the performance of your connection too. Make sure you have a filter on every phone line if you are sharing the phone jack with your ADSL connection. Most of time they should have done that when they install the ADSL but just in case.