My Plextor 16/10/40A IDE drive burns at 16X with Plextor software, so I know the computer is configured correctly, but with VV3.0 it will only burn at 6X with buffer underrun. CD Architech can't see this drive, but on my older SCSI it can burn at 8X, which is top speed for that drive. PLextor says I need an upgrade from Sonic Foundry; Sonic Foundry is not sure why this is happening. Has anyone else experienced this?