Looking at the thread you created a while back a lot of us did offer plenty of advise on the matter - http://forums.thinkbroadband.com/otherisp/f/4017852-...
Did you try alternative hardware? As mentioned in the said thread, some routers are not so good on ADSL2+ even though they were previously rock solid on ADSL.
that is true, my Netgear connects fine but it connects at a lower sync rate to my Speedtouch, which connects higher, but will disconnect at least once a week.
The netgear is rock solid, now Belkins never seem to work that well here, borrowed my mates a few months back just to see and it was awful.
Desktop machine now powered by windows 7 pro 64bit , laptop by ubuntu
On ADSL24 using C&W network.