ok, for the record, somebody might find this info useful if they stumble upon it using the search function.
my dvd drive is an nec 1300a. i rang nec today tel:- 0208 993 8111 and they pointed me in the direction of their german website click here which has much more information than the UK or USA sites. There are firmware updates and technical help questions amongst other things.
the chap i spoke to was very helpful and told me to check in device manager/IDE ATA/ATAPI controllers. there are 3 items here. if one of them is displayed as standard then that suggests that the motherboard does not have the correct driver info and i should check their website for driver information.
it seems that either no-one wants to help (hope thats not it!) or this is a very tricky subject. i see quite a few cd/dvd writing threads with no answers. anyway i will post further details as/when i make progress and update incase somebody finds it useful
From you last posting.. >it seems that either no-one wants to help (hope thats not it!) or this is a very tricky subject. i see quite a few cd/dvd writing threads with no answers .. May I just offer an explanation.. most dont have a problem,or indeed may not have had to correct a problem similar to yours & may not have the same O/s, therefore wont offer to post on a subject they have little experiance of .Please be sure No one here would withhold info that could help you..Most times however some forum members will research the required data if time allowseven though they havent a problem themselves, So its nothing personal at all.We would rather offer help that may actually achieve a result. thank you for posting our findings it may well help someone else..