DVD-RW media capacity?

[1]

I just installed two DVD-RW drives on my computer, Pioneer DVR-06U and a NEC 1100A. I'm using NERO Express. When I try to burn a DVD to a DVD-R disc, it states the capacity of the media is 500mb (like a CD-R disc). Is there somthing that I'm missing. Drives are recognized as DVD-R drives. Discs (multiple) are DVD-R. Thanks for any help.:frown:

 

[Need4Speed]

u sure u have dvd selected for your compilation? and not cd?