I have the same problem but have found that if you try downloading the same files later at nite, you don't have as much trouble. I also click the song that I want from 3 different sources, (T3, cable, modem for example) and start the download will all 3 which ever one comes up with the download first, is the one I use. I know this isn't a way to solve the problem just a little hint on what I found to work. Some things that I don't have sources for during the day, if I do the download at night right before going to bed and allowing it to run all night then I usually get it downloaded.

Sorry couldn't be more help.
Moe