DVD Burning

[noel.c]

I have been using the Movie Factory 2 version which is included with Media Studio Pro7 to create and burn DVDs without any problems.
I have recently upgraded to Movie Factory 5 and SP1 and now I am unable to burn DVDs from the main MF5 window. The progress bar hangs at 91% and after a period of 10 to 15 minutes I get the message:
"Failed to burn data to disc"

I can create DVD Folders and Disc Images in MF5 and burn them using the Copy Utility and Burn From Disc Image respectively, but not from the main MF5 window.
I am using the same burner (Sony DVD RW DW-Q30A) and media that I used successfully with Movie Factory 2.
What could be the problem?

noel.c