That sounds like a case of your ISP shaping your connection at certain times of the day/night...
Try sticking to the one thread it gets confusing for the members trying to help you if you start new threads...
Now that I have seen your system details, your ISP does shape p2p....
Router Blocking Limewire! no connection. help please!! Firewall/Proxy Settngs http://www.gnutellaforums.com/showth...379#post202379
You could also try port forwarding your modem/router...This may get rid of the wall you are seeing...
These are your instructions...
Port Forwarding for the Westell Versalink 327W
Also try looking for your missing files here....
If you've updated LW and can't find your downloads!