The available speeds are 2.4x, 4x, 6x. The ones supported by the writer). For the 1x I guess it uses a generic write approach. Might try one of those speeds.
Tried to find an updated firmware for that writer (A Dell?) but no luck.
You might get better luck with Verbatim 2.4x rated discs (Made in Singapore) as the ones you use can be tricky in older writers.
Focus Servo Error might indicate a faulty writer, but I guess you doesn't have any issues burning other branded discs?
Thanks alot for reply, will try again at diff speed. The laptop is an Acer, not Dell and was brand new at Xmas so it better not be a faulty writer lol. I have heard that Vebatim were the best but my husband has always used Aone discs on his tower which have always worked so if no luck with the speed change then will try the Verbatims. Thanks again, much appreciated.