I'm really sorry you've been having trouble downloading the free tutorials (they are tremendous helps). As others have said, it may be a hardware or setting problem, etc. Or, it may be that there really are too many downloads.

Try refreshing the "too many downloads in progress" page over and over and over. As soon as the page is refreshed, refresh it again (kind of like hitting the redial button on your phone over and over again). If the site is too busy, it will eventually let you in (took me 30 minutes once).

If the site really is too busy, It's well worth the effort.

Good luck!

P.S. If you do get in and download successfully then you can always consider upgrading your membership so you don't have to go through that anymore.