CAV Setting Won't Stay Set

I’m using a Yamaha F1 burner with Ahead’s InCD software (on a WinXP Pro system). I’m trying to use the CAV writing feature,however the InCD checkbox: “Use CAV (constant angular velocity) for writing”, will not stay checked. I check it, click “Apply”, then close the properties box. When I reopen it, it’s unchecked again. Both the F1 firmware and InCD are updated to the latest versions. Any help is greatly appreciated.