random disconnection of usb modem stick

Greetings

I use my huawei E156 to connect to the internet.I use bsnl sim for this connection (its got good range).for the last couple of days my usb keeps getting disconnected after i plug it in.it stays online for some time and then suddenly gets cut.(the modem does not get disconnected from the laptop but from the internet)
i use mobile partner to connect.
in office i use the same laptop with wifi and it works perfectly well.(but when i try opening utorrent or any pdf the dial up connection comes up even when the wifi is on)
i am sure there are no hardware issues wit the usb stick.

i use windows vista 32 bit edition
PLEASE HELP
 
Last edited:

My Computer

System One

  • Manufacturer/Model
    dell studio xps 16
    Graphics Card(s)
    ati moblity radeon hd 3670
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