Can record to CDRW not CDR

> Hi,
> I have an Artec wrr4848 CDRW. I am running Win XP Pro. I
> am able to burn audio or data to cdrw disks but nothing on
> cdr disks. I have tried using various software and
> different media but each time it has failed if I am using
> cdr disks.
> The programme I am using at the moment is Easy CD Creator
> 6 and when burning a cdr I get a buffer under-run error
> message even though buffer under-run prevention is checked
> and leaving it to the programme to select the best speed
> etc. The slowest speed I can select manually is 8x but
> frequently when burning to cdr it drops to 1x or .9x, in
> other words less than 1x and then the error message comes
> up. This happens regardless of whether I am trying to burn
> a data cd or audio also if I try to copy just a couple of
> files or copy a whole cd.
> The writer is listed as being compatible with Win XP and
> Easy CD Creator 6 and as far as I know I am using the
> latest firmware.
> I am at a loss to know why I can burn anything to a cdrw
> disk but nothing to cdr disks.
> On the occasions when it says the cdr disk was
> successfully completed, I have put it in the cd rom drive
> and it just runs for ages before stopping and
> then 'properties' show it as empty. If I then try to use
> it again, I am told that it is not a blank disk.
> I have done all the usual things, closing all other
> running applications etc and uninstalling any other
> burning software.
> Anyone any ideas please.
> Regards,
> Brian
>
>