20A3P XP5X Nero Essentials 7 - Burner on go slow after burning 1 Dual Layer DVD

Everything was fine until yesterday when I burned my first dual layer DVD. Since then, burns to regular DVDs have become very slow, at aound 40 minutes even though Nero says they are burning at 18X. Nothing else has changed.

Any ideas?

Many thanks.

I can answer my own question… It dropped into PIO mode. D’oh…