I have a HP DVD640 Burner DVD+R DL I purchased Verbatim 2.4X Double Layer DVD+R DL discs to use and my player will not burn onto them. I figure the media is just incompatible with my player. I can burn onto Memorex single layer discs just fine. SO, should I go the Memorex DL route?... or is there any one out there who has this player and uses DL and can tell me which media they use.