burning error message Movie factory 2 se

[camhel]

I have been using the Movie Factory 2 SE for 2-3 years without any problems. I received it with my purchase of Canopus systems DVD authoring program called Let's Edit. The video file is then rendered by the Procoder program in Let's Edit and then I open Movie Factory to edit the file and get it prepared for burning. In the last couple of days I have attempted to burn 2 different files but have come up with the following error message after the burn process is about 1/3 through "Failed to record data to the disk. Error DVD+R SPTI-2A-02-06-29-00". Any help is appreciated.
Thanks
Vince