I have been having the same problem with my adsl con.
It was the "auto-disconnect" feature that was kicking in.
I tried to search for this in all my settings, but
couldn't find anything about it. Eventually, just before
it dis-connects, you get a little warning window pop
up saying "this connection will disconnect in 30 secs".
Try checking the box that say's do not use auto
disconnect.
You've got to catch the little bugger just as it's about
to kick you off.
Hope this helps :)
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