One thing that I try doing is to keep pressing start...eventually it actually works! lol!
I did that for a day and a half with no luck. Then I followed the advice Dermmy gave me and it worked on the first try.
Here it is. Clear everything in your CM left window, (hit the "clear" button.)
In CM, erase your ID and password and re-enter them.
Get out of 2010.
Clear your download cart, you might have something left in it from the last time you used it - from 2006, 2004 downloads?? It could be from years ago.
Leave Trainz and leave the Forum. The point here is that you want the download station and Auran to think that you gave up, committed suicide, and therefore will never be back.:'( A bit over dramatic perhaps, but I'm serious. Don't bother Auran or the DLS for at least 5 or 10 minutes.
Then re-try. Try it with just one item, rather than a whole sch*dt load, just to get it started.
I did all this and it worked the first time when I came back, and it's been fine since.
Give it a try.