Problem with my DVD-Rom and virtual Drives

[Neogun]

I Installed Daemon-tools on my pc. And after i did the drivers for my DVD-rom got f'ed up. and when i go to system, and check the hardware for DVD and CD Roms theres an yellow ! on all the drives. and none of them have Drive Letters. And when i check the properties for the REAL DVD-Rom there's a message which says something like this(i have to translate from norwegian to english)
Could Not Load Driver for this Hardware. The Driver Might be damaged or missing(Code 39)


Anyone know how i can fix this. so i can use my DVD-Rom and Virtual Drives. My DVD-Rom is an: Nec DVD RW ND-2500A.