Help with my DVR-A08XLA

hey guys i might seem a bit of a bore but ive just installed the afor mentioned dvd dual layer burner and installed the software but for some reason it will not load any dvds but the installation dvd and ive tried almost evrything can you help me figure it out?

i can run evrything else and burn but i cant run any dvds ive set it for region 4 as thats my region(australia) but still nothing

desperatly need help

Perhaps there is a region-lock made by software; windows operating system does it too regardless the number of changes left in the unit.