Connection Problem - Internet automatically disconnects

[hnv]

Hi...I've been using BSNL dataone for barely a few days, and my connection just stops working after 5 to ten mins of usage. I have to turn off the modem (UT300R2U) and turn it on again - and sometimes it'll start working again, sometimes it won't. If it doesn't i wait for ten - fiftenn mins and try - again it starts working - but not for long, half hour max. The first few days this wasn't a problem, but now it is consistent. It bugs me like a sore itch, and I can't browse for long nor download, and its really getting to me. Pissing me of. Any idea whats the problem? Have a 256kbps unlimited connection.I use the ethernet port. The 'internet' light just stops blinking when it happens. Help!