I'm also experiencing this problem, using IE on windows 7 on brand new computer. It started letting me do a few files and then eventually kept dwindling down to the point where now I have no files downloading and I get this error message. I tried reseting my router, my modem, my computer, deleting all internet files - history, cookies, etc... and still not working. I've logged out of site and relogged back in, also did the delete my cookies on the site as well. I'm at a loss of how to fix.