broadband connection breaking and resetting

recently, whenever I run a public torrent for every 30 sec or so broadband band connection just dies ( internet light stops blinking on the modem and stays like that for a second or two, it actually supposed to blink) as you can imagine it it seriously frustrating. but it never happens while I'm running a private torrent.so obiously I thought too many connections or connection request might be that cause so I changed the value of network.max_connections to 100 but even after that nothing happned. so I tried same settings in utorrent connection break out happened only thrice for the duration of 2 and half hour I'm guessing this problem is specific to bitcomet any suggestions to pinpoint the cause?and also is there any tools,scripts to log the timings of connection breakouts ?

OS :windows 7 & 8
bitcomet 1.37 (X64 & X32) zipped non-installer version
(happened in both OS and versions, in my desktop and laptop)