Webbis, I do believe there's a firmware update for your liteon drive............ ( E ) Might try googleing for that as your machine doesn't seem to recognize those blank discs your using to well
I 14:31:51 Destination Media Type: DVD+R DL (Disc ID: MKM-003-00) (Speeds: 4x, 6x, 8x)
I 14:31:51 Write Speed: 2.4x
Failing all else, perhaps your drive has gone south on you.