Try to Ctrl+C the .lua error message and report it in this thread. The error messages will tell you or someone else what's up.
That being said, a known issue with Automation is running in fullscreen then alt-tabbing; causes an epic crash! Run it in windowed mode and the problem (theoretically) ceases to exist
As far as I'm aware, there is no separate 64bit version of Automation but I have a 64bit windows 7 install and my game runs fine... The .lua message will be the key!
Alternately you could re-install the game and run the manual patcher (found in the support section of the forum) as the auto patcher can get too excited and break the install!
