Dvd burner will not burn HELP!

I have a dell e310 and i have never used the dvd burner, i have restored a few times prior. well when i try to use my burner to burn a dvd, it tells me to put the right disk in, or tells me to insert a disk in drive d. (The cd burner works fine.)well i have used both dvd-rw which is what my dvd drive says and the plus. I am lost for why it wont work, and used different burning programs. none work, If anyone knows why please let me know…THANKS for your time.