Roxio Easy Create CD-DVD software 6 Porgram can not find my DVD's in BURN procedure

Previously I have made use of my dvd creator software to burn DVD’s of my home movies.
I spent a dozen hours creating a video making use of DVD builder. I clicked the BURN button and as usual attached the demanded settings.
I get a message that Roxio does not detect a recorder.
I get SONY DVD RW recorders on both systems.
Appreciate and help thatyou might offer.