Using TV suite on 15 day trial, very pleased with program until I tried to burn a Dual Layer (DVD-R DL) disc (GSA-20N burner is supposed to handle all formats), the program kept prompting to insert the disc when it was already in the drive. Changed to a DVD+RW (4.7GB)which was recognised , reinserted DL, again no recognition of disc. Any thoughts on why would be welcome