Windows 7: BroadBand disconnect and don't reconnect automatically

i have beetel router (beetel 110 BX1).
when i use the internet for a long time it gets disconnected. the disconnection happens when computer is idle or am not browsing.
I'm able to ping the router when there is not internet access. i can see the LEDs which corresponds to data transfer blinking..



i googled n searched but i did not get a solution

M

Try disabling IPv6 support in network and sharing. its often the cause of random disconnects

Ken