Problem With Lightscribe

I have a Philips Lightscride Dvd writer model pbdv16lsp1. Used the lightscribe function around 2 months ago and it worked fine. tried yesterday and all i get is a thick black circle around the inner edge of the disc around 1cm thick. I am using Ahead Nero version 6. Tried re-installing software, updating driver from philips, getting the latest lightscribe update and the latest update of nero. Still it does exactly the same. Please help. !! :sad: