got the unit for xmas in 2004 at walmart got memorex dvd r + and drv rw+ blank disks i was recording from vcr using the dvd r ones when i recorded them they looked fine but when i wanted to watch them last week gave me a fail error then i tried the other blank memorex disks when trying to prepare they say fail disk too the dvd rws from memorex work ever once in while the last rw i got left says no disk after ejected couples time it comes up then i went office depot got some of there dvd rw's disk to try ,came home put it in the machine it started perparing then said fail error again, i called customer support had me to put in new firm ware thingie, now i am stuck what dvd blanks disks works with this thing