DVD burner reading DVD's as CD's
i have a DVD rom drive (F) and a DVD burner drive (E). the DVD burner plays DVDs fine but when i put a blank DVD in the name changes from "DVD-RW Drive" to "CD drive". i'm currently without a burning program because the place where we bought this computer from gave us nero 6 disk but no serial #, so i have bin buring files by copying and pasting them into E: drive. i have only bin doing this on CD-R's and it has worked but i can't burn anything onto DVD+R's.
so basically how do i get it to read them as DVD's and not CD's?
CPU-Intel Pentium 4 630 3.0Ghz / 2MB Cache ~~OS Windows XP SP2
MOBO-Gigabyte 8I915P Duo Pro Intel Socket 775 (PCI-E)~~HDD-Western Digital 160GB(SATA)
PSU-Aspire 500W ATX~~RAM-1GB PC3200 DDR SDRAM (512x2 Dual Channel)
GPU-MSI GeForce 6600 GT(PCI Express)~~Monitor Viewsonic VA902B 19" 8ms~~ ATI TV Wonder Pro (TV Tuner)
~~Still to come~~: eVGA e-GeForce 7800 GT