I have a Lite On SHW-160P6S DVD burner. It works great for CD-R's and DVD+/-R's, but it won't recognize any DVD+R Double Layer discs. I have the latest firmware. In the My Computer window, when I insert a blank DVD+R DL, the drive icon changes from "DVD-RW Drive" to "CD Drive", and says there is no free space and no used space on the disc. Can anyone help?