My error, sorry!
I use an external burner for BR disks, but there does not seem to be an easy way to get CDBurnerXP to show both, so that I can decide between the built-in one and the external USB one. My builtin one is not reliable with DL DVDs. It seems that I need to remove the builtin in one. It does sometimes "see" both, but I have not been able to work out what sequence of events allows that..... Thanks for any help offered. Andy M.