Guys

Ideas please

I have a Sony Vaio PCG FX705, with combined CD/DVD reader & CD writer.
Manu: Hitachi/LuckyGoldStar. Type HL-DT-ST RW/DVD GCC-4080N
OS is XP Home SP1

The CD writer WAS burning six months ago but now will not burn.
Ideas Please.

Symptoms

I send the files to the CD drive, then go to that drive, highlight the files
and select "Write these files to CD" from the dropdown menu. The MS wizard
appears; I bug "next" and the wizard reports "no disk in drive. Please insert disk".

Factoids, and what I have tried

- Audio CDs play, Data CDs read, DVDs play OK.

- System has NO CDROM burning SW except native XP CD code.

- If I bug "trouble shoot" the system says
"Device Status. This device is working properly"

- tried setting and disabling DMA
Specifically
"Computer management" under "IDE ATA/ATAPI" lists
drive 0 and drive 1 for Primary IDE Channel.
drive 0 and drive 1 for Secondary IDE Channel.
I tried setting both channels of Pri and Sec to PIO only

- changed the imapi run parameters from manual to automatic.

- Drivers listed for the HL-DT_ST are:-
cdrom.sys Windows driver
imapi.sys Windows driver
PxHelp20.sys Veritas Driver
redbook.sys
storprop.dll

I think the problem is very likely caused by either

a) Reinstall of XP Home (OS crashed some months ago)
b) installation of Service pack/other software.

Johnp