It's not your media but the driver for the GH22LS30. I have the same problem.
If you look at your device manager, you will see that the OS is using a standard CD-ROM/DVD driver, not LG.
I contacted LG and they said they are investigating the issue and it may have something to do with the chipset. I have an i7 940.
So you cannot use Lightscribe or burn above 4x with vista 64. But if you use vista 32, I was able to burn up to 16x dvd and lightscribe with the same drive
But I'm not going back to 32 bit. So I have a slow drive (4x) without lightscribe.