Dear X,
Do not use any extra DOS drivers if you are working with Win98 or win ME or XP !
It will confuse the OS and not solve your problem.
I (and NERO's help forum http://www.nero.com/en/helptool/333.htm) advise you to upgrade your firmware of your ARW4420 to version 1.3 .
To check which firmware your W4420 is using at the moment you can download a useful utility at http://www.nero.com/en/631940826989307.html
That probably will solve the problem.
Read the upgrade instructions and take the CD-disc out of the tray before you flash your cd drive and hope for no powerfailure during flashing.
The new firmware is to get at
http://forum.firmware-flash.com/dl_firmware.php?download_id=1312
Reboot after flashing.
Good luck
Hidde Kuiper