Unable to Drag and Drop to CD/DVD Burner

Just upgraded from a CD burner to a DVD burner (LG GSA-4081B multi-format
drive) on Windows XP. With my old CD burner, I used to be able to drag files
onto the CD icon and it would copy them into a temporary area of the hard
drive, then when I had everything together I could write them to the CD.

If I try to do this with the DVD burner (with a blank CD-R in it), it pops
up an error box :-

H: is not accessible. Incorrect Function

I can write CD's using Nero-type programmes and similarly write DVD's, but I
seem to have lost the built-in XP CD writer functionality.

Any clues?

Thanks,

Steve