When I use Ulead DVD Movie Factory to burn CDs with my Pioneer DVR-104, it sets the write speed to Max. I select the write speed test option, and then it sets the write speed to 18x. Amazingly it actually worked once at this speed, but most of the time I get buffer underrun messages. Once I saw an option for 1X show up under write speed, but then it went away and Max and 18X are my only choices now. How do I get the 1X option back?

Thanks,
Ed