This is typical of what happens when there is a conflict with another program. I was in a hurry once and when Express did not load as quickly as I thought it should I clicked on it again resulting in 2 copies of Express running and it stopped as you described. Express works in conjunction with most programs but some do conflict especially other decrypting programs such as; DVD43, AnyDVD, DVDIdle, Fab CSS free & Region free, and some other programs that run in the back ground. Check the burn log to see where program stopped. It can be opened in text editors that come with Windows.

Mack