Starting Connection Problems

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Hi, Hope someone can help with a problem that seems to have started over the past few months after using Limeware successfully for years. I am running Vista Business(as admin) with an Intel Core 2 Quad (2.40ghz) & 2 GB memory - Limewire version 4.18.8 as I really dislike the new Limewire 5!). I get connected to Limewire easily enough, which increases to turbo charged and starts downloading - and then, for no reason, the downloading halts at 0 per sec & the connection reverts to "starting connection" and sticks there. I have tried disconnecting and reconnecting but still never get past starting connection and downloading will not restart, even though the connection to the users is still showing. If I close Limewire down and re-open it starts off again as Turbo charged and restarts the downloads, but then reverts back to starting connection after a while. This seems to happen every evening and all weekends but not so much overnight and during a weekday. Is it to do with busier perids & how can I overcome it as it stops me downloading anything when I am off work? Hope someone could help please. By the way, I use a wireless internet connection which has no problems. Thanks