no firewall but randon discon & aborted dnlds?

Hi-
Please help? I am on a PC, have a high-speed connection am not behind a firewall, and only try 4* downloads. Still I consistenly experience LW disconnecting for no reason and also aborted downloads at 80% and higher. After being disconnected I have to close and reopen the program to get it to reconnect, then I lose the partial download and it just says "0%" under "progress". This is so frustrating! Now I have a list of downloads that say "Requery sent, waiting..." It seems they will never reconnect on their own, do I have to start the search totally over again? And why does it not save the partial download and resume when I reconnect?

I have been paitent for over a month but it's gotten so frustrating that I am about to give up. Any advice on how to do this better would make my day.

Thanks!